b first travel

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UNCLASSIFIED (U)

OFFICIAL TRAVEL

(CT:LOG-343;   02-11-2022) (Office of Origin:  A/LM)

14 FAM 531  EmploymenT and Assignment Travel

(CT:LOG-343;   02-11-2022) (State/USAGM/USAID/Commerce/Agriculture)

When two or more types of travel are combined, the pertinent provisions apply separately to each segment of the trip.  Types of official travel follow below.

14 FAM 531.1  Appointment Travel

a. Official travel and transportation for U.S. citizen employees, their families, and effects, may be authorized from place or places of residence or other place specifically authorized to official duty station.

b. Effects may be authorized to be shipped at U.S. Government expense from place of storage.  Shipment of effects is authorized for employees whose tour of duty at post is one year or more or who serve less than a year and are transferred or otherwise removed from post for the convenience of the U.S. Government (see 3 FAM 2440 regarding curtailments).

14 FAM 531.2  Alternate-Seat-of-Government Travel

a. Official travel and transportation for U.S. citizen employees, their families, and effects, may be authorized to and from the alternate seat of government.

b. There is no per diem at destination unless specifically authorized. Shipment and storage of effects, and privately owned vehicle, may be authorized.

14 FAM 531.3  Relocation Travel

Official travel and transportation may be authorized for employees to move from one official duty station to another.  This includes permanent change-of-station (PCS) and transfer moves.

14 FAM 531.4  Home Leave Travel

a. Official travel and transportation may be authorized for U.S. citizen employees and their families from post or any place abroad where presence is due to U.S. Government orders to home leave address within the United States (or U.S. commonwealth or possessions) and return to post of assignment or a new official duty station.  Home leave travel is not authorized for family members already on separate maintenance allowance (SMA) authorization (see also 14 FAM 536.1 ).

b. Employees and their families traveling should spend 20 workdays in the United States (see 3 FAM 3434.2 for exceptions).  Except as provided in 14 FAM 532.4 the family may not travel until the employee is eligible for home leave and has been issued home leave orders.

14 FAM 531.5  Rest and Recuperation Travel

a. Travel of an employee and eligible family members may be authorized and performed in accordance with 14 FAM 523.2-1 , subparagraph f(1)(d) and in 3 FAM 3720 .

b. Each post eligible for rest and recuperation (R&R) travel will fund one of the following three travel options to employees and eligible family members:

(1) Round-trip travel to post's designated foreign relief point.  Lists of eligible posts by regional area and their designated relief points are in 3 FAH-1 Exhibit H-3722(1) through 3 FAH-1 Exhibit H-3722(5) ; or

(2)  Round-trip travel to any one city in the United States (the 50 States and the District of Columbia) or one city in its territories including American Samoa, the Commonwealth of Puerto Rico, Guam, the Commonwealth of the Northern Mariana Islands, and the U.S. Virgin Islands; or

c.  Only the designated foreign relief point, the traveler's selected city in the United States or U.S. territory, or "R&R Cost-Construct Cap" can be shown as the destination on the authorized itinerary of the R&R travel authorization.

e.  Employees authorized premium class travel through MED/DRAD will have a cost-construct cap established on a case-by-case basis using the same methodology used for economy caps outlined in 3 FAH-1 H-3726.3 .

f.  The Department recommends that posts use the lowest cost unrestricted airfares for travel to the designated relief point or U.S. city or U.S territory.  However, funding for R&R travel is a post function and, as such, the final decision whether to use restricted or unrestricted fares for R&R travel is a post responsibility.

14 FAM 531.6  Marine Security Guard

See 12 FAM 435 .

14 FAM 531.7  Military Furlough, Resignation, Retirement, and Other Separation Travel

a. Official travel and transportation may be authorized for U.S. citizen employees, their eligible family members, and effects, from post or any place where presence is due to U.S. Government orders to designated place of residence in the United States (see definition of "United States" in 14 FAM 511.3 ).

b. When a U.S. citizen employee elects to reside at other than the designated place of residence, expenses must be allowed based on constructive cost (for "cost constructed travel," see 14 FAM 511.3 and 14 FAM 612.3 ) to designated place of residence in the United States.  See 3 FAM 2510 on separation of U.S. citizen employees and 3 FAM 2560 on military furlough.

c.  This regulation provides Civil Service employees, who mandatorily converted to Civil Service from Foreign Service under the Foreign Service Act of 1980, those benefits of travel and/or transportation of effects to which they were entitled at the time of such mandatory conversion.

14 FAM 532  Family tRAVEL

14 FAM 532.1  Family Travel for Representational Purposes

14 FAM 532.1-1  Eligibility and Purpose

Travel for representational purposes may be authorized for one family member only.  The authorizing officer is expected to make sparing and judicious use of this authorization.  In all cases, the justification must demonstrate a clear advantage to the United States.

14 FAM 532.1-2  Within Country of Assignment

a. As a general guideline, local travel of a family member should be authorized when:

(1)  Representation by the officer alone could not be accomplished effectively; or

(2)  Protocol or local customs would be served; or

(3)  The travel is necessary in connection with VIP visits or important meetings at which spouses of foreign dignitaries are present.

b. The chief of mission in consultation with heads of other agencies in their country of assignment will develop local rules and practices to promote the maximum degree of uniformity in the exercise of this authority.

14 FAM 532.1-3  Outside Country of Assignment

Representational travel outside the country of assignment is restricted to family members of high-level officers and will be authorized only when a clear need for dual representation exists.  Normally, travel will be restricted to eligible family members of chiefs of mission, deputy chiefs of mission, country public affairs officers, and USAID mission directors or USAID representatives.  However, in exceptional circumstances, the eligible family members of a subordinate officer may be authorized such travel.  Typical of the circumstances warranting representational travel outside the country are the following:

(1)  When an ambassador or USAID mission director accompanies a foreign dignitary to the United States on a state visit or as a presidential guest and the dignitary is accompanied by a spouse or other members of the household;

(2)  When a State, or USAID officer attends an international conference or meeting sponsored by a group or organization of nations, such as the United Nations, and the spouses of participants have also been invited to attend; and

(3)  When the President sends U.S. delegations abroad or congressional or other high-level delegations proceed abroad, accompanied by their spouses.

14 FAM 532.1-4  Domestic-Based Employees

Representational travel by family members of domestically assigned employees is restricted to the Secretary, Deputy Secretary, Deputy Secretary for Management and Resources, and Under Secretaries, unless a waiver is granted by M, and will be authorized only when a clear need for such representation exists.

14 FAM 532.1-5  Authorization and Documentation

a. Department of State : The chief of mission may (subject to the availability of travel funds) authorize representational travel within and/or outside the country of assignment for employees at post.  This authority may be redelegated only to the deputy chief of mission.  The Assistant Secretary of the regional bureau may authorize for the chief of mission.  For representational travel outside the country of assignment, advance approval must also be obtained from the assistant secretary of the regional bureau.  For domestic based employees, the Under Secretary for Management must approve all representational travel for family members.  Representational travel by a family member of M must be approved by D.

b. USAID :  The director of the USAID mission or USAID representative may (subject to the availability of travel funds) authorize representational travel within and/or outside the country of assignment.  This authority may not be redelegated. For representational travel outside the country of assignment, advance approval must also be obtained from the regional bureau Assistant Administrator in Washington.

c. The officials cited above must provide and sign a justification statement.  For control and inspection purposes, the authorizing officer should record and file the justification statement in the Department's eTravel Services (ETS) software (currently E2 Solutions).

14 FAM 532.2  Adding New Eligible Family Members

Employees who wish to add a new eligible family member – EFM - (see 14 FAM 511.3 for the definition of "eligible family member") do so by completing Form OF-126, Foreign Service Residency and Dependent Report, to GTM/EX/IDSD or HCTM/FSC for USAID staff.  Once the new EFM is added to the Form OF-126 then the employee’s travel authorization will be updated to include new EFM and travel expenses may be incurred based on the updated travel authorization, notwithstanding the time limitation specified in 14 FAM 584.2 .  Travel will be authorized from either the location at which the new EFM joined the family (for example, place of birth or adoption) or from the employee’s official home of record.  Shipment and storage of additional effects may be authorized in accordance with 14 FAM 613.2 .

14 FAM 532.3  Advance Return of Family Financed by U.S. Government

14 FAM 532.3-1  General Policy

In certain cases, an employee's family may be authorized, before the employee's eligibility for travel, to return to employee's residence in the United States.

14 FAM 532.3-2  Conditions of Authorization

a. The Department of State, USAGM, Commerce, Agriculture, or the USAID mission director or USAID representative may authorize advance travel of an employee's family members when the chief of mission or the head of the agency establishment abroad determines that the public interest requires the return of a member of the family for compelling personal reasons of a humanitarian or compassionate nature, including but not limited to cases which may involve physical or mental health or death of any member of the immediate family.

b. The Department or Agency in Washington, DC, may authorize advance travel of family members when there is an obligation imposed by an authority or circumstances over which the individual has no control.  Advance travel may be authorized by the Department or Agency in Washington, DC, after family members have been at the post at least 6 months under the following conditions:

(1)  A child who is not eligible for educational travel (see 14 FAM 532.5 ) has been at a post abroad and educational needs (for the equivalent of grades 1 through 8 only) so require; or

(2)  A child 21 years or older, is unmarried, and has traveled to the post before attaining such age (see 14 FAM 532.6 ).

14 FAM 532.3-3  Authorized Costs

Only one-way transportation will be authorized for advance return of family.  If a family member subsequently travels at U.S. Government expense to the same or another post to which the employee is assigned, the total cost of the advance return and subsequent travel may not exceed the cost which would have been incurred had the family member traveled at the same time as the employee.

14 FAM 532.3-4  Repayment Agreement

Before any obligation of U.S. Government funds is incurred, the employee must execute a repayment agreement in accordance with the format in Form DS-4020, Repayment Agreement for Advance Travel of Family.  The original and one copy should be forwarded to:

(1)  State :  GTM/CDA, by memorandum, subject:  APER;

(2)  USAID :  M/PM, USAID/W as an attachment to a memorandum;

(3)  Commerce : USFCS/OIO/OFSP as an attachment to a memorandum;

(4)  USAGM :  E/O, P/N, VOA/X, and D/OHR as an attachment to a memorandum.

(5)  USDA/FAS :  Foreign Agricultural Affairs, International Services Division; and

(6)  APHIS :  International Services/Administrative Services/Personnel.

14 FAM 532.3-5  Repayment Requirements

The conditions under which repayment must be made by the employee for travel expenses borne by the U.S. Government in connection with the advance return of employee's family are as follows:

(1)  The employee fails to complete the service period (see 3 FAH-1 H-2423 , subparagraph c) required to become eligible for travel and transportation at U.S. Government expense; or

(2)  There is a change of dependency status which cancels the eligibility of family member(s) for return travel to the United States (see definition in 14 FAM 511.3 ) at U.S. Government expense.  (A divorce or an annulment prior to the issuance of travel orders no longer cancels eligibility of family members for return travel to the United States.)

14 FAM 532.3-6  Repayment Liquidation or Refund

(CT:LOG-343;   02-11-2022) (State/USAGM/USAID/Commerce/Agriculture)

If the employee is subsequently transferred, assigned, separated, or returned on leave at U.S. Government expense to the United States and the expenses of the advance travel become a proper obligation of the U.S. Government, the employee will be relieved of the obligation set forth in the repayment agreements to the amount of allowable expenses (see 14 FAM 532.3-4 ).  If the employee has previously made repayment, employee may request and receive an appropriate refund.

14 FAM 532.4  Advance Travel of Family Financed by the Employee

a. The employee may arrange for advance travel of family, paying the cost initially and claiming reimbursement after the employee has been issued travel authorization which covers the travel of family and after the employee has reached eligibility date.  Reimbursement is limited to the amounts payable had the family traveled at the same time as the employee.

b. Reimbursement may be made for advance travel or return travel to the United States for a spouse or domestic partner as defined in 3FAM 1610 and/or minor children of an employee who have traveled to the post as eligible family members even if, because of divorce, annulment or dissolution of domestic partnership, such spouse or domestic partner as defined in 3 FAM 1610 and/or minor children have ceased to be eligible family members as of the date the employee becomes eligible for travel.  Reimbursable travel may not be deferred more than 6 months after the employee completes personal travel pursuant to the authorization.

c.  If the advance travel of family was to the employee's temporary duty (TDY) post and the employee was transferred to the post at the end of the employee's TDY, employee may claim reimbursement for expenses of allowable travel and transportation of family and effects which were incurred prior to the effective date of transfer of the employee and the date of employee's transfer travel authorization.

14 FAM 532.5  Educational Travel

a. Travel of a child may be authorized in lieu of an educational allowance, once each way annually between school and the employee's post for secondary education and for college education in accordance with section 280, Standardized Regulations (Government Civilians, Foreign Areas) and the Federal Travel Regulations.

b. Unaccompanied air baggage is allowable in accordance with 14 FAM 613.3-1 .

14 FAM 532.6  Travel of Children 21 Years of Age or Older

a. An employee's child who is unmarried and who is 21 years of age or older may be authorized return travel to the employee's place of residence for separation purposes in the United States (see definition in 14 FAM 511.3 ), provided the child, when attaining the age of 21 was at, or proceeding to, a post abroad to which the employee was assigned.  The first travel authorization that is issued to the employee authorizing travel of the family after a child has reached the age of 21, constitutes authority for such travel.  The return of the child to the United States should be completed within 1 year of the date the employee's travel begins.

b. A child 21 years or older, who proceeds to the employee's post, may not be returned to the United States nor perform any travel at U.S. Government expense, except as provided for educational travel up to the 23rd birthday, plus additional years allowed for any military service, in subchapter 280 of the Standardized Regulations (Government Civilians, Foreign Areas).

c.  Travel of a child who is under 21 will usually be authorized to an employee's next assignment if the employee's transfer is to occur before the child's 21st birthday.  If that child's travel does not commence prior to turning 21, that authorization is no longer valid.

d. If a child commences R&R or home leave/return travel before attaining the age of 21 and turns 21 while in travel status, the child is authorized return to post under the travel authorization that was in effect prior to his turning 21.

14 FAM 532.7  Travel of Family While Employee Is on Temporary Duty (TDY) En Route to or from Post of Assignment

a. Payment of per diem during an employee's period of TDY, which may not exceed 30 calendar days total, is authorized for members of an employee's family accompanying the employee to the post of assignment only under the following conditions:

(1)  When the employee is ordered to stop within the country of destination for orientation, training, or consultation while en route to post of assignment;

(2)  When the employee is ordered to stopover outside the country of destination for orientation, training, or other TDY while en route to the post of assignment, provided that the stopover is in the positive interest of the U.S. Government and is made necessary by a threat to the health, safety, or well-being of the employee’s family if required to continue on to post of assignment other than in the company of the employee;

(3)  In cases where the family member, because of representative responsibility in the U.S. Government's interest, is required to stop at agency headquarters while en route abroad to employee's post of assignment in order to undergo special orientation and/or training designed to ensure the effective discharge of those responsibilities; or

(4)  In any other cases when specifically authorized by the agency in advance in writing in travel orders.

b. When an employee is ordered to stop for TDY in the United States or abroad en route to or from employee's post of assignment, the family does not have to accompany the employee as long as they join the employee at the stopover point.  Per diem at the stopover point may be allowed for members of the family only during the period of TDY of the employee and for the actual time at the TDY location.

c.  Per diem, not to exceed 3 work days, may be authorized when an employee or the employee's family members who are at a constituent post and are traveling on home leave, transfer, or separation orders must stop, at the time of travel, at the Embassy in country or at an embassy in a neighboring country for the purpose of storing or retrieving effects or obtaining passports, visas, or immunizations.

d. Stopovers should generally not be authorized for family members in connection with international, interagency, interregional, or intermission conferences, unless specifically authorized by the agency in advance in writing and reflected in travel orders.

14 FAM 532.8  Return Travel of Spouse, Domestic Partner as Defined in 3 FAM 1610, and/or Dependent Children to the United States in Connection with Marital Separation, or Divorce, or Statement of Dissolution of Domestic Partnership

a. Return travel of an employee's spouse or domestic partner as defined in 3 FAM 1610 may be authorized to the employee's service separation address in the United States (see definition of "United States" in 14 FAM 511.3 ) or any other location on a cost-constructive basis from the employee's post of origin to the employee's separation address when a permanent marital separation or divorce is intended, or a statement of dissolution of domestic partnership has been submitted.  Generally, a separation agreement should exist, but in the absence of an agreement, the chief of mission or head of agency's establishment abroad may determine that such travel is warranted and may initiate authorization action.  The circumstances upon which this determination is based should be summarized in writing and retained at post in accordance with 5 FAH-4, Records Management Handbook.

b. Return travel of spouse or domestic partner as defined in 3 FAM 1610 may be included in the first travel authorization issued to the employee authorizing travel of the family after an agreement to separate, divorce, or dissolve a domestic partnership is reached.  In the circumstances referred to in paragraph a of this section, such travel may also be requested as advance travel in accordance with 14 FAM 532.3 and 14 FAM 532.4 .

c.  Only one-way transportation to the employee's service separation address, or to any other location in the United States on a cost-constructive basis from the employee's post of origin to his or her separation address, will be authorized for return travel of spouse or domestic partner as defined in 3 FAM 1610 .  If the employee subsequently requests travel of the spouse at U.S. Government expense to the same or another post to which the employee is assigned, the total cost of the return and subsequent travel may not exceed the cost which would have been incurred had the spouse or domestic partner as defined in 3 FAM 1610 traveled at the same time as the employee.  In such cases, if the cost of the return and subsequent travel exceeds the employee's authorized travel, the employee will be liable for payment of the excess cost.

d. Before any expenses are incurred for return travel of spouse or domestic partner as defined in 3 FAM 1610 , the spouse or domestic partner as defined in 3 FAM 1610 must execute an agreement in accordance with the format in Form DS-4021, Agreement for Return Travel of Spouse (or domestic partner).  This agreement states that the spouse or domestic partner as defined in 3 FAM 1610 understands that travel back to the same post will not be authorized at U.S. Government expense, and that the agreement is signed voluntarily.

e. Travel of dependent children of an employee may be authorized under this provision only if a legal custody agreement exists or the employee otherwise agrees in writing to permit the children to leave post permanently with the spouse.  The employee must also submit a revised Form OF-126, Foreign Service Residence and Dependency Report, to declare as a loss those children for whom return travel is requested under this provision (see 3 FAH-1 H-2347.8 , subparagraph a).  The employee may also request advance travel of children in accordance with 14 FAM 532.3 , if travel is not intended to be a permanent return to the United States.

14 FAM 532.9  Transfer Travel

(CT:LOG-343;   02-11-2022) (State/USAGM/USAID/Commerce/Agriculture) (Foreign Service)

a. Official travel and transportation may be authorized for U.S. citizen and Foreign Service national employees, their families and effects, from old post, or any place where presence is due to U.S. Government orders, to new post.  Transportation of effects is allowed from old post to new post and/or to point of storage; or to new post from old post, previous posts, and/or points of authorized storage.

b. Effects may be shipped between places other than those authorized subject to provisions in 14 FAM 612.3 .  When emergency conditions exist at the new post, another destination may be designated for travel of the family and transportation and storage of effects and a motor vehicle.  Upon termination of the emergency, travel and transportation to the new post may be authorized.

14 FAM 532.10  Spouse Travel to Obtain a Visa or Reset Residency

Management officials at post may authorize, from post funds, travel expenses when the spouse of an employee assigned to post must travel out of country to obtain appropriate visas or reset residency permissions to remain in-country when the host government will not accredit the spouse.  The travel expenses under this provision may include transportation expenses, per diem, and authorized miscellaneous expenses (e.g., visa fees, where authorized under 14 FAM 562.1 , subparagraphs a(1) through a(4).  Expenses incurred are for the spouse only.  Time in travel status should be minimized to the extent possible to obtain a visa or reset residency permissions at the most cost-effective point to post.  Spouses who are employed on family member appointments (FMA) or personal services agreements (PSA) are not authorized administrative leave for the purpose of the travel.

14 FAM 533  Temporary Duty (tdy) Travel

14 FAM 533.1  General

Official travel and transportation may be authorized for U.S. citizen employees from any place to TDY station or stations and thence to such place or to post (see also 14 FAM 532.7 covering travel of eligible family members). Official travel and transportation may be authorized for Locally Employed (LE) Staff from their post of employment to TDY station or stations and for return to the post of employment.

14 FAM 533.2  Authorizing Temporary Duty (TDY) Travel

a. State only :  Form JF-144, Temporary Duty (TDY) Official Travel Authorization, is used for approving TDY travel.  Approval may cover travel performed for administrative or medical purposes, rest and recuperation, short-term training, attendance at conferences, etc., between the United States and other countries, within the United States, or abroad.  Authorizations issued in the form of telegrams, etc., are confirmed by the subsequent issuance of a Form JF-144, or equivalent official form.

b. USAID only :  See ADS 522, Performance of Temporary Duty travel in the United States and Abroad.

c.  Commerce only :  Form CD-29, Travel Order, is used for authorizing TDY travel when headquarters, Washington, DC, issues the travel orders.  Otherwise, Form JF-144 is used when post issues the travel orders.  Included is travel for administrative purposes, rest and recuperation travel, short-term training, medical purposes, attendance at conferences, etc., performed abroad, within the United States, and between the United States and points abroad.  Authorizations issued in the form of telegrams are confirmed by the subsequent issuance of either a Form CD-29 or a Form JF-144.

d. USDA only :  Form AD-202, Travel Authorization, is used for authorizing TDY travel.

e. USAGM only :  Form IA-34-A is used for authorizing TDY travel; Form JF-144 is used for overseas correspondence travel.

14 FAM 533.3  Training Attendance

Official travel may be authorized for employees to receive training.

14 FAM 533.4  Conference Travel

14 FAM 533.4-1  Attendance

Agencies must select conference sites that minimize conference costs and conference attendees' travel costs.  Agencies must minimize conference attendees' travel costs by authorizing the minimum participation necessary to accomplish agency goals.  The authorizing official must assure that the number of attendees from the Department is necessary and justified.  In addition, the need for conference and meetings for which the total travel and per diem estimate exceeds $5,000 must be authorized by an Assistant Secretary, executive director, or equivalent.

14 FAM 533.4-2  Conference Site

When available, use U.S. Government-owned or U.S. Government-provided conference facilities to the maximum extent possible.  The authorizing officer should avoid conference sites that might appear extravagant to the public.

14 FAM 533.4-3  Conference Site Selection Process

a. Locality selection procedures :

(1)  When arranging to conduct a conference, the authorizing officer must consider at a minimum three alternative conference sites;

(2)  Each considered site must be selected based on the belief that it would result in lower overall conference costs and conference attendees' travel costs.  The sponsoring or co-sponsoring office must survey the cost of conference facilities at each of the considered sites, and must determine the potential cost to the U.S. Government of conducting the conference at each of the alternative sites.

b. Exception :  A conference site may be selected without following the procedures outlined above for the reason of disproportionate participation.  The procedures outlined above do not apply when a majority of the U.S. Government attendees are from the locality proposed as the conference site, or when only one site accomplishes conference goals.  In the latter case, the authorizing officer must certify in writing that the selected locality is the only conference site compatible with accomplishing the sponsoring or co-sponsoring office's objectives.

c.  Documentation :  The authorizing officer must document the cost of each alternative conference site, and must retain a record of the documentation for every conference held.  The authorizing officer must also make the documentation available for inspection by the Office of Inspector General (OIG), or for other interested parties.

14 FAM 533.5  Experts and Consultants Travel

Persons employed intermittently as consultants or experts and persons serving without compensation (including citizens or subjects of other countries) are authorized travel expenses, including per diem, while away from their homes or regular places of business, in accordance with 14 FAM 560 .

14 FAM 533.6  Information Meeting Travel

(CT:LOG-343;   02-11-2022) (State/USAGM/USAID/Commerce/Agriculture) (Foreign Service and Civil Service)

Official travel and transportation may be authorized for employees to attend a meeting to discuss general agency operations, and/or to review status reports or discussion topics of general interest.  If a site visit is conducted as part of the same trip, the entire trip should be considered a site visit (see 14 FAM 533.10 ).

14 FAM 533.7  International Conferences

When travel to, or in connection with, conferences is financed under Department of State appropriations available for international conferences, such travel must be performed in accordance with the provisions of the travel authorization and other appropriate instructions issued by the Department pertaining to the conference.

14 FAM 533.8  Invitational Travel Authorizations Federally Financed

Each invitational travel authorization must specify the purpose of the travel (e.g., conference attendance, information meeting, speech presentation, etc).

14 FAM 533.9  Invitational Travel Authorizations Non-Federally Financed

To defray the cost of air travel, any donations from non-Federal sources must comply with the Department's regulations in accommodations on airplanes ( 14 FAM 567.2 ), including all applicable OMB guidelines (OMB 93-11), as well as the Department’s regulations regarding gifts of invitational travel (see 2 FAM 962.12 ).

14 FAM 533.10  Site Travel

Travel of an employee may be authorized to visit a particular site in order to perform operational or managerial activities; e.g., oversee programs, grant operations, or management activities for internal control purposes; carry out an audit, inspection or repair activity; conduct negotiations; provide instructions; or provide technical assistance.

14 FAM 533.11  Special Mission Travel

Travel of an employee may be authorized to carry out a special agency mission such as involvement in noncombat military unit movements; providing security to a person or a shipment (e.g., diplomatic pouch); moving witnesses from residence to other locations; and covering travel by Federal beneficiaries and other nonemployees.

14 FAM 533.12  Speech or Presentation Travel

Travel of an employee may be authorized to make a speech or a presentation, deliver a paper, or otherwise take part in a formal program other than a training course where the authorizing official makes a specific determination in writing that such activity is related to and in furtherance of the agency’s mission.

14 FAM 534  Medical Travel

a. Official travel and transportation may be authorized for U.S. citizen employees and their eligible family members from any place where presence is due to U.S. Government orders to nearest locality where suitable medical care can be obtained and thence to an official duty station.

b. Travel of attendants may be authorized.  For other special provisions, see 16 FAM 316 and 14 FAM 523.2-1 , paragraph e.

14 fam 535  oTHER TRAVEL

14 FAM 535.1  Directed Departure

14 FAM 535.1-1  General

When, in accordance with 3 FAM 2443 , it is the judgment of a chief of a diplomatic mission that the departure of an employee assigned by the Department or Agency to a post under the chief of mission's jurisdiction would be in the interest of the U.S. Government, the authorizing officer at the post may issue a travel authorization detailing the employee to a nearby country.  For the Department, the post-authorizing officer may issue a travel authorization transferring a State Department employee and that employee's eligible family members to Washington, DC.  For USAID, a travel authorization transferring an employee to Washington, DC, must originate in or have prior approval of Washington, DC headquarters.  For USAGM, a travel authorization transferring an employee to Washington, DC must originate in or have prior approval of Washington, DC headquarters.

14 FAM 535.1-2  Procedures in Connection with Directed Departure

To authorize purchase of transportation permitting the detail of an employee or to transfer an employee and eligible family members in accordance with 3 FAM 2443 , chiefs of mission may allow issuance of Forms OF-1169, U.S. Government Transportation Request (GTRs).  The travel order establishing the official obligation of funds will be issued by the Department or the Agency, after the travel commences, upon receipt of the report required in 3 FAM 2445 .  Travel will be chargeable to the current applicable appropriation.  Other fiscal data will be supplied by Washington, DC.  Movement of household effects and shipment of automobiles must not be authorized until receipt of instructions from the Department or Agency.

14 FAM 535.2  Travel under Authorized/Ordered Emergency Evacuation

14 FAM 535.2-1  General

a. When the Under Secretary for Management (M) makes a determination that an emergency exists at a post requiring the evacuation of official U.S. citizen employees, official travel and transportation may be authorized for the employees, their eligible family members, and effects from post of assignment to place designated in the travel orders, and thence to post.

b. When M makes a determination that an emergency exists at a post requiring the evacuation of Foreign Service national employees, official travel may be authorized for the Foreign Service national employees and their immediate families to the nearest practicable place for the duration of the emergency.

c.  The authorizing officer at post must issue individual or blanket travel authorizations (see 14 FAM 628 for shipment and storage of household effects (HHE)).

14 FAM 535.2-2  Travel Authorizations under Authorized/Ordered Emergency Evacuation

a. State only :  The authorizing officer at post must issue individual or blanket travel authorizations.  Each authorization must cite the names of the persons traveling.  In addition to the usual post distribution of copies, the authorizing officer must furnish information copies of all evacuation travel authorizations to the:

(1)  Bureau of Global Talent Management (GTM/CDA/AD);

(2)  Travel and Transportation Management Division (A/LM/OPS/TTM);

(3)  Appropriate regional bureau; and

(4)  Office of Accounting Operations (CGFS/F/AO).

b. Commerce only :  The authorizing officer must furnish evacuation travel authorization copies to the:

(1)  Office of Foreign Service Human Resources (USFCS/OFSHR);

(2)  State's Travel and Transportation Management Division (A/LM/OPS/TTM); and

(3)  Office of Planning and Management.

c.  USAGM only :  The authorizing officer must furnish evacuation travel authorization copies to the:

(1)  Office of Foreign Service Personnel (D/OHR);

(2)  Office of Administrative Operations Division (M/AO); and

(3)  Appropriate administrative office.

d. USDA/FAS only :  The authorizing officer must furnish evacuation travel authorization copies to the:

(1)  Foreign Agricultural Affairs/International Services Division (USDA/FAS/OFSO/ISD); and

(2)  State's Travel and Transportation Management Division (A/LM/OPS/TTM).

e. APHIS only :  The authorizing officer must furnish evacuation travel authorization copies to the International Services/Administrative Services/Travel Section.

f.  U.S. Despatch Agents :  The Department's or Agency's transportation office will ensure that the appropriate U.S. Despatch Agent receives a copy of the evacuation order or request and authorization for use in clearing the employee's shipment(s) through U.S. Customs.

14 FAM 535.2-3  Prohibitions Against Official and Personal Travel to Posts under Authorized/Ordered Emergency Evacuation

See 3 FAM 3770 regarding requirements and restrictions for official and personal travel to posts under authorized departure, ordered departure, suspended operations, contingency operations, and posts designated partially unaccompanied or unaccompanied.

14 FAM 535.3  Emergency Visitation Travel

The cost of emergency visitation travel in connection with the serious illness, injury, or death of an immediate family member is performed in accordance with the provisions of 3 FAM 3740 .

14 FAM 535.4  Visitation Travel

14 FAM 535.4-1  Authorization

Travel of an employee or eligible family member may be authorized and performed in accordance with regulations in 14 FAM 523.2-1 , subparagraph f(1)(h), and in 3 FAM 3730 .

14 FAM 535.4-2  Travel to Countries With Closed Posts Or No U.S. Diplomatic or Consular Relations

See 3 FAM 3780 regarding requirements for official and personal travel of employees to countries with which the United States has no diplomatic or consular relations or where all U.S. posts have been closed, and where travel may be prohibited or restricted.

14 FAM 536  SPECIAL TRAVEL

14 FAM 536.1  Voluntary Separate Maintenance Allowance (SMA) Travel

14 FAM 536.1-1  Authorization

a. Travel may be authorized for all eligible family members for whom SMA is granted under Section 260 of the Department of State Standardized Regulations (DSSR).

b. Per 3 FAM 3232.3-3 , only one change of status of SMA for each family member will be permitted for a single tour of duty.  See DSSR 264.2(b) regarding change in status in an evacuation.

14 FAM 536.1-2  Authorized SMA Location(s)

a. The following SMA travel at U.S. Government expense may be approved to authorized location(s):

(1)  When the employee's point of origin is in the United States, an employee's family members may remain at the employee's last official duty station in the United States, or travel to the home leave location designated on Form OF-126 or Washington, DC when the employee is transferred to a foreign post of assignment;

(2)  When an employee transfers from one foreign post of assignment to another, an employee's family member(s) may travel to the home leave location designated on Form OF-126, Foreign Service Residence and Dependency Report, or Washington, DC;

(3)  If an SMA is granted during an employee's tour of duty abroad, the employee's family members may be authorized travel to the home leave location designated on Form OF-126, or Washington, DC.

b. For shipment of household effects under SMA Grant, see 14 FAM 613.7 .

14 FAM 536.1-3  Alternate SMA Location

a. U.S. family members traveling to an alternate SMA location in the United States (see definition in 14 FAM 511.3 ) may do so on a cost-constructive basis.  The maximum amount of reimbursement is the cost required to move the family members from the authorized point of origin to the authorized SMA point.

b. Foreign location: An employee's family members traveling to a foreign SMA location may do so on a cost-constructive basis.  The maximum amount of reimbursement is the cost required to move the family members from the authorized point of origin to the authorized SMA point.

c.  Should an employee's SMA grant be terminated due to the employee's subsequent transfer to another post of assignment while the family members are at a foreign location, the employee will be responsible for the payment of excess travel costs involved in relocating the family members to the new post of assignment.  The excess travel costs, if any, must be determined through a constructive cost analysis that compares the travel cost of the employee's eligible family members that would have been authorized from an authorized SMA location to the next post of assignment compared to the amount that is actually incurred.  Any amount in excess of the amount allowable is payable by the employee.

d. Family members in a foreign alternate SMA location have no diplomatic status or privileges.

14 FAM 536.1-4  SMA Travel Financed by Employee

An employee who initially pays the costs of advance travel of family members may subsequently claim reimbursement of travel and transportation expenses if the agency later authorizes an SMA grant for the affected family members.  An employee may not recover a greater amount than would have been incurred had the U.S. Government procured the travel (see 14 FAM 544.2 , paragraph c).

14 FAM 536.2  Death of U.S. Citizen Employee

The following applies to an employee abroad, on domestic assignment, or on TDY.

14 FAM 536.2-1  Expenses in Connection with Remains

a. Following the death of a Foreign Service employee or EFM while in a foreign area, expenses may be authorized for the reasonable cost of preparing remains including the cost of embalming, clothing, cremating, casket, or container suitable for shipment to the place of interment; expenses incurred in complying with local and U.S. laws; and transportation of remains from place of death to the employee's authorized separation address. Transportation of remains to any other place in the United States or its territories as designated by the next-of-kin may be done on a cost-construct basis against the authorized separation address, by surface, or by air.  For shipment of remains to a foreign country, see 14 FAM 536.2-4 .

b. Following the death of a Foreign Service employee or EFM while on assignment in the United States or a non-foreign area, expenses may be authorized for transportation of the remains from place of death to the employee's authorized separation address. Transportation of remains to any other place in the United States or its territories as designated by the next-of-kin may be done on a cost-construct basis against the authorized separation address, by surface, or by air.

c.  For Civil Service employees, refer to FTR, chapter 303.

14 FAM 536.2-2  Family Travel Expenses

Expenses may be authorized for the travel of the family from the last place at which dependents resided and traveled at U.S. Government expense, to any place in the United States designated by the next-of-kin as separation residence or place of interment.  For travel to foreign countries, see 14 FAM 536.2-4 .

14 FAM 536.2-3  Transporting Effects

Expenses may be authorized for the transportation of effects from the last post of assignment, and safe haven if effects are located there, and from any place where effects are stored at U.S. Government expense, to separation residence designated by the next-of-kin.  For transportation to foreign countries, see 14 FAM 536.2-4 .

14 FAM 536.2-4  Foreign Destinations

Actual authorized expenses may be authorized for travel, transportation of effects, and/or shipment of remains to a foreign country and are allowed up to the constructive cost to place last designated by employee as separation residence.  Place of interment may differ from residence for travel and transportation of family.  When one location or the other is in a foreign country, this does not limit the next-of-kin's discretion in designating an authorized location in the United States for either interment or travel and transportation of family.  Authorized expenses may be incurred at any time within 12 months following the date of death, unless the time limitation is waived by the GTM/EX Director or USAID Executive Officer for USAID staff.

14 FAM 536.3  Family Member Death

a. This section applies when the employee is assigned abroad or is on domestic assignment.

b. Actual expenses may be authorized for round-trip travel of a family member and for transportation of remains to the separation address or on a cost-constructive basis to any other point in the U.S. or foreign country.

14 FAM 536.3-1  Expenses in Connection with Remains

See 14 FAM 536.2 .

14 FAM 536.3-2  Family Travel Expenses

Travel expenses are authorized for an employee or an eligible dependent to accompany the remains of a family member to the place of interment in the United States or abroad and return to the duty station (see 3 FAM 2550 ).

14 FAM 536.3-3  Transporting Effects

Transportation of effects is not authorized in connection with a family member death.

14 FAM 536.4  Travel and Transportation Expenses Authorized in Connection with Deaths of Locally Employed (LE) Staff when in Temporary Duty (TDY) Travel Status

Travel and transportation expenses are authorized when a LE Staff dies at a post abroad to which that LE Staff has traveled at U.S. Government expense.  Types of expenses authorized are detailed below.

14 FAM 536.4-1  Expenses in Connection with Remains

Expenses in connection with remains are authorized only as prescribed by 5 U.S.C. 5742, and within made available to the post.  The chief of mission must determine the payments to be made.

14 FAM 536.4-2  Transportation of Effects

Transportation of effects is authorized from the TDY post where death occurred to the LE Staff's post of employment.  Payments are to be made from allotments made available to the post.

14 FAM 537  through 539 unassigned

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The Most Beautiful Stations on the Moscow Metro

You might have heard that there are some beautiful metro stations in Moscow. Soviet decorations, chandeliers, mosaic painting and statues are common in many of the stations. The good news is that the Moscow Metro does not cost a lot of money and many of the most beautiful stations on the Moscow metro are on the same line, so you can almost get on and off at each station to visit these. Over the New Year holidays, I had a free afternoon and decided to visit some of these stations. Check out what I found below…..

The main stations that you will want to visit are on the Number 5 line, also known as the Circle Line. An advantage of this line is that you can get to it very easily and quickly no matter where you are in Moscow. The announcements on the metro are in Russian as well as English so you don’t need to worry if your Russian language skills are not good.

If, like me, you arrive in Moscow via train from Kyiv , then you will arrive at a metro station which many Muscovites believe to be the most beautiful of them all…..

Kievskaya metro station was opened in 1954 and features white marble walls which curve upwards and have with large mosaics surrounded by a gold trim in a very classical style. The mosaics depict life in Ukraine and was designed by a Ukrainian who wanted to display Ukraine’s influence and contribution to Soviet Russia.

Kievskaya, one of the most beautiful stations on the Moscow metro

Soviet era artwork between the arches

Mosaic with golden trim

People carrying flags is a common theme

Going into battle

Belorusskaya

If you look at a map of the metro , you will want to go in a clockwise direction on the circle line. So you will want to get on the train going in the Barrikadnaya direction and not Park Kultury. Stay on this line until you reach the 2nd station, Belorusskaya. This station was built in 1952 and like Kievskaya also features white marble pylons and a plaster ceiling.

The ceiling features 12 mosaics in an octagonal shape depicting Belarusian life, while the tiling on the floor is said to resemble a Belarusian quilt. One of the passageway exits of the station has a statue called ‘Belarusian Partisans’ of three men wearing long coats, holding guns and carrying a flag.”

Belorusskaya metro platform

Soviet artwork on the roof

The hammer and sickle features prominently in the metro artwork

Three men carrying guns, holding the flag…

Mayakovskaya

To get to the next station, we need to change onto the green line (line 2) and go just one stop to the station of Mayakovskaya. This station has an art deco theme and, for some, resembles an elaborate ballroom. The columns are faced with stainless steel and pink rhodonite while the marble walls and ceiling have 34 mosaics with the theme “24-hour Soviet Sky. Apparently, Stalin resided here during the 2nd World War as the station was used as a command post for Moscow’s anti-aircraft regiment.

Mayakovskaya metro

24-Hour Soviet Sky mosaic

Bomber planes

It looks like planes flying over Red Square

Novoslobodskaya

It’s time to get back on the metro and return to Belorusskaya. At Belorusskaya, change to the circle line again and continue clockwise to the next station, Novoslobodskaya. With its 32 stained glass panels, this station reminds me of a church. The panels were designed by Latvian artists and are surrounded by a brass border.

Novoslobodskaya metro

The platform of Novoslobodskaya metro

Stained glass artwork

The golden trim around artwork is also very common

Prospekt Mira

Back on the metro and again just one stop until our next station, Prospekt Mira. This station was originally called Botanichesky Sad after the nearby Botanical Gardens of the Moscow State University. The pylons are covered in white marble and decorated with floral bas-relief friezes. The ceiling is decorated with casts and several cylindrical chandeliers.

Prospekt Mira metro station

Notice the floral decoration

Komsomolskaya

On the metro once more and once more we are going just one stop to the next station – Komsomolskaya. This station is famous for its its yellow ceiling. The chandeliers in this station are huge. The photos below do not do this station justice.  For me, this station resembles a presidential palace.  You hace to see it for yourself to truly appreciate it.

Because of it’s location, this is one of the busiest stations in the Moscow metro as it serves three of the main train stations in the city – Leningradsky, Yaroslavsky, and Kazansky so be prepared for a lot of people.

Komsomolskaya metro

The yellow ceiling seems to go on forever

Yellow ceiling and artwork

One of the ceiling mosaics

Elektrozavodskaya

When you are ready to leave Komsomolskaya metro station behind, then get back on the circle line and go one stop to Kurskaya and change to the blue line (line 3) and go to two stops to the Elektrozavodskaya station. This station gets it’s name from a nearby electric light bulb factory and has a somewhat industrial but also futuristic style, with 6 rows of circular lamps (there are 318 lamps in total). I think this is one of the most beautiful stations on the Moscow metro for how unique it is. The station was opened in 1944 after a delay because of the 2nd World War and features 12 marble bas-reliefs of the struggle on the home front during the war.

The Komsomolskaya metro station

The struggles of war at home

Fixing machinery

Hard at work

Making weapons

Building a tank

Even the station sign is elaborate

Ploschad Revolyutsii

Back on the metro line 3 (but in the other direction), getting off at the 3rd stop – Ploschad Revolyutsii (Revolution Square). This is located underneath the square in Moscow of the same name and is a short walk from Red Square in the city centre. It is the perfect place to end a visit around Moscow’s metro. The station features red and yellow marble arches with a total of 76 sculptures in between each arch. The sculptures are supposed to represent the people of the Soviet Union and include soldiers, farmers, industrial workers, children etc… I noticed a lot of people touching the golden chicken in the photo below as well as the show of the woman. I am assuming that this is for good luck.

Industrial worker

Touch the chicken for good luck

Sculpture of the people of the Soviet Union

Woman reading a book – touch the shoe for good luck

In education

Parent and child

These are some of what I think are the most beautiful stations on the Moscow metro. Which ones are your favourite? Would you add any to this list?

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19 comments.

Kievskaya definitely caught me off guard. Didn’t know Moscow metro stations were THIS extravagant! Mayakovskaya is gorgeous too with the marble walls and mosaics. I might just need to book a flight over to admire all of these!

Do it! Kievskaya was my first introduction to the Moscow metro as I got an overnight train from Kyiv.

You know, in the States, all we ever hear is bad stuff about Russia. It’s nice to see other (and lovely!) dimensions of such a controversial place.

It’s the same in the UK which is why I prefer going to see somewhere and making up my own mind. It’s all ‘politics and bullshit’ as I say

I went to Moscow about 13years for Christmas and went to train stations, so I can see these amazing mosaics and chandeliers. I agree with you that are beautiful Stations for sure and I could of wandered around for days. I think Kievskaya is definitely my favourite out of them all and I even have some similar pictures as you.

I imagine Moscow would have been a little different 13 years ago but these stations have probably always looked beautiful

Food and Footprints

You chose some great stations for this write up! Beautiful details in these stations and would love to visit them sometime. Particularly like the Komsomolskaya station with that yellow ceiling!

Thank you very much. Komsomolskaya seems to be a lot of peoples favourite stations too

Sumit Surai

Wow! Without the text I would have thought them to be some museum or gallery.

I know exactly what you mean!

Rosie Fluskey

Wow, it is just stunning! How does anyone get to work with so much to look at. I’m surprised at the very bourgeois-looking Komsomolskaya station. I would have thought it was all too Tzarist looking, but then I haven’t been to Russia yet lol. This has just made me want to go more!

Wow, that’s a lot of artwork. I wonder how old some of these pieces are?

Generally most of the stations are from 1940-1960 approximately. The later stations are more functional than style.

My mother-in-law was in Moscow fifty years ago and still raves about the metro stations. So far, I could not imagine much. But now! The pictures are great and I think it’s almost a pity that this splendor is underground. But for every user of the Metro can enjoy a free trip to the world of art. Susanne

True. It is like having a free trip to an art museum/gallery. I hope that you can one day visit Moscow and see for yourself.

Oh wow, I would never have known that these were metro stations. The ceilings remind me of how you need to look up sometimes, even in the commuter rush!

It is true about life in general, we just go from A to B looking directly in front of us instead of around us

Wow, I would have never guessed that these were stations. The decor is so pretty and not one I’m used to seeing at metro stations. Love the ceiling at The Komsomolskaya metro station.

They certainly don’t look like metro stations. The ceiling there is one of my favourites too!

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• Data Structures
• Linked List
• Binary Tree
• Binary Search Tree
• Segment Tree
• Disjoint Set Union
• Fenwick Tree
• Red-Black Tree
• Advanced Data Structures
• Breadth First Search or BFS for a Graph

BFS on different language

• C Program for Breadth First Search or BFS for a Graph
• Java Program for Breadth First Search or BFS for a Graph
• Python Program for Breadth First Search or BFS for a Graph
• BFS for Disconnected Graph
• Applications, Advantages and Disadvantages of Breadth First Search (BFS)
• Breadth First Traversal ( BFS ) on a 2D array
• 0-1 BFS (Shortest Path in a Binary Weight Graph)

Variations of BFS implementations

• Implementation of BFS using adjacency matrix
• BFS using STL for competitive coding
• Breadth First Search without using Queue
• BFS using vectors & queue as per the algorithm of CLRS

Easy problems on BFS

• Find if there is a path between two vertices in a directed graph
• Find if there is a path between two vertices in an undirected graph
• Print all the levels with odd and even number of nodes in it | Set-2
• Finding the path from one vertex to rest using BFS
• Find all reachable nodes from every node present in a given set
• Program to print all the non-reachable nodes | Using BFS
• Check whether a given graph is Bipartite or not
• Print all paths from a given source to a destination using BFS
• Minimum steps to reach target by a Knight | Set 1

Intermediate problems on BFS

• Traversal of a Graph in lexicographical order using BFS
• Detect cycle in an undirected graph using BFS
• Detect Cycle in a Directed Graph using BFS
• Minimum number of edges between two vertices of a Graph
• Word Ladder (Length of shortest chain to reach a target word)
• Print the lexicographically smallest BFS of the graph starting from 1
• Shortest path in an unweighted graph
• Number of shortest paths in an unweighted and directed graph
• Distance of nearest cell having 1 in a binary matrix

Hard Problems on BFS

• Islands in a graph using BFS
• Print all shortest paths between given source and destination in an undirected graph
• Count number of ways to reach destination in a Maze using BFS
• Coin Change | BFS Approach
• Water Jug problem using BFS
• Word Ladder - Set 2 ( Bi-directional BFS )
• Implementing Water Supply Problem using Breadth First Search
• Minimum Cost Path in a directed graph via given set of intermediate nodes
• Shortest path in a Binary Maze
• Minimum cost to traverse from one index to another in the String

Breadth First Search (BFS) is a fundamental graph traversal algorithm . It involves visiting all the connected nodes of a graph in a level-by-level manner. In this article, we will look into the concept of BFS and how it can be applied to graphs effectively

Table of Content

• Relation between BFS for Graph and BFS for Tree
• Breadth First Search (BFS) for a Graph Algorithm

How Does the BFS Algorithm Work?

• Implementation of BFS for Graph using Adjacency List
• Complexity Of Breadth-First Search (BFS) Algorithm
• Applications of BFS in Graphs
• Problems on Breadth First Search or BFS for a Graph
• FAQs on Breadth First Search (BFS) for a Graph

Breadth First Search (BFS) for a Graph:

Breadth First Search (BFS) is a graph traversal algorithm that explores all the vertices in a graph at the current depth before moving on to the vertices at the next depth level. It starts at a specified vertex and visits all its neighbors before moving on to the next level of neighbors. BFS is commonly used in algorithms for pathfinding, connected components, and shortest path problems in graphs.

Relation between BFS for Graph and BFS for Tree:

Breadth-First Traversal (BFS) for a graph is similar to the Breadth-First Traversal of a tree .

The only catch here is, that, unlike trees , graphs may contain cycles, so we may come to the same node again. To avoid processing a node more than once, we divide the vertices into two categories:

• Visited and
• Not visited.

A boolean visited array is used to mark the visited vertices. For simplicity, it is assumed that all vertices are reachable from the starting vertex. BFS uses a queue data structure for traversal.

Breadth First Search (BFS) for a Graph Algorithm:

Let’s discuss the algorithm for the BFS:

• Initialization: Enqueue the starting node into a queue and mark it as visited.
• Dequeue a node from the queue and visit it (e.g., print its value).
• Enqueue the neighbor into the queue.
• Mark the neighbor as visited.
• Termination: Repeat step 2 until the queue is empty.

This algorithm ensures that all nodes in the graph are visited in a breadth-first manner, starting from the starting node.

Starting from the root, all the nodes at a particular level are visited first and then the nodes of the next level are traversed till all the nodes are visited.

To do this a queue is used. All the adjacent unvisited nodes of the current level are pushed into the queue and the nodes of the current level are marked visited and popped from the queue.

Illustration:

Let us understand the working of the algorithm with the help of the following example.

Step1: Initially queue and visited arrays are empty. Queue and visited arrays are empty initially. Step2: Push node 0 into queue and mark it visited. Push node 0 into queue and mark it visited. Step 3: Remove node 0 from the front of queue and visit the unvisited neighbours and push them into queue. Remove node 0 from the front of queue and visited the unvisited neighbours and push into queue. Step 4: Remove node 1 from the front of queue and visit the unvisited neighbours and push them into queue. Remove node 1 from the front of queue and visited the unvisited neighbours and push Step 5: Remove node 2 from the front of queue and visit the unvisited neighbours and push them into queue. Remove node 2 from the front of queue and visit the unvisited neighbours and push them into queue. Step 6: Remove node 3 from the front of queue and visit the unvisited neighbours and push them into queue.  As we can see that every neighbours of node 3 is visited, so move to the next node that are in the front of the queue. Remove node 3 from the front of queue and visit the unvisited neighbours and push them into queue.  Steps 7: Remove node 4 from the front of queue and visit the unvisited neighbours and push them into queue.  As we can see that every neighbours of node 4 are visited, so move to the next node that is in the front of the queue. Remove node 4 from the front of queue and visit the unvisited neighbours and push them into queue. Now, Queue becomes empty, So, terminate these process of iteration.

Implementation of BFS for Graph using Adjacency List:

Time Complexity: O(V+E), where V is the number of nodes and E is the number of edges. Auxiliary Space: O(V)

Complexity Analysis of Breadth-First Search (BFS) Algorithm:

Time complexity of bfs algorithm: o(v + e).

• BFS explores all the vertices and edges in the graph. In the worst case, it visits every vertex and edge once. Therefore, the time complexity of BFS is O(V + E), where V and E are the number of vertices and edges in the given graph.

Space Complexity of BFS Algorithm: O(V)

• BFS uses a queue to keep track of the vertices that need to be visited. In the worst case, the queue can contain all the vertices in the graph. Therefore, the space complexity of BFS is O(V), where V and E are the number of vertices and edges in the given graph.

Applications of BFS in Graphs:

BFS has various applications in graph theory and computer science, including:

• Shortest Path Finding: BFS can be used to find the shortest path between two nodes in an unweighted graph. By keeping track of the parent of each node during the traversal, the shortest path can be reconstructed.
• Cycle Detection: BFS can be used to detect cycles in a graph. If a node is visited twice during the traversal, it indicates the presence of a cycle.
• Connected Components: BFS can be used to identify connected components in a graph. Each connected component is a set of nodes that can be reached from each other.
• Topological Sorting: BFS can be used to perform topological sorting on a directed acyclic graph (DAG). Topological sorting arranges the nodes in a linear order such that for any edge (u, v), u appears before v in the order.
• Level Order Traversal of Binary Trees: BFS can be used to perform a level order traversal of a binary tree. This traversal visits all nodes at the same level before moving to the next level.
• Network Routing: BFS can be used to find the shortest path between two nodes in a network, making it useful for routing data packets in network protocols.

Problems on Breadth First Search or BFS for a Graph:

Faqs on breadth first search (bfs) for a graph:, question 1: what is bfs and how does it work.

Answer: BFS is a graph traversal algorithm that systematically explores a graph by visiting all the vertices at a given level before moving on to the next level. It starts from a starting vertex, enqueues it into a queue, and marks it as visited. Then, it dequeues a vertex from the queue, visits it, and enqueues all its unvisited neighbors into the queue. This process continues until the queue is empty.

Question 2: What are the applications of BFS?

Answer: BFS has various applications, including finding the shortest path in an unweighted graph, detecting cycles in a graph, topologically sorting a directed acyclic graph (DAG), finding connected components in a graph, and solving puzzles like mazes and Sudoku.

Question 3: What is the time complexity of BFS?

Answer: The time complexity of BFS is O(V + E), where V is the number of vertices and E is the number of edges in the graph.

Question 4: What is the space complexity of BFS?

Answer: The space complexity of BFS is O(V), as it uses a queue to keep track of the vertices that need to be visited.

Question 5: What are the advantages of using BFS?

Answer: BFS is simple to implement and efficient for finding the shortest path in an unweighted graph. It also guarantees that all the vertices in the graph are visited.

Related Articles:

• Recent Articles on BFS
• Depth First Traversal
• Applications of Breadth First Traversal
• Applications of Depth First Search
• Time and Space Complexity of Breadth First Search (BFS)

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How the Key Bridge Collapsed in Baltimore: Maps and Photos

By Weiyi Cai ,  Agnes Chang ,  Lauren Leatherby ,  Lazaro Gamio ,  Leanne Abraham and Scott Reinhard

On Tuesday, a major bridge in Baltimore collapsed into the water seconds after it was struck by a cargo ship, sending vehicles on the bridge into the river below. The ship lost power and issued a mayday call shortly before it hit the bridge.

The ship, a 948-foot-long cargo vessel called Dali, was about a half hour into its journey toward Colombo, Sri Lanka, when it hit a main pillar of the bridge. All crew members are safe, according to the ship’s owners.

Follow our live coverage .

A mayday call from the ship gave officials enough time to stop traffic at both ends of the bridge. The waters where the bridge collapsed are about 50 feet deep. By Tuesday morning, six construction workers who had been fixing potholes on the bridge remained missing as divers and other emergency workers on boats and helicopters continued to search for them. Two others had been rescued, and one was in the hospital.

Francis Scott

Patapsco River

The ship left the Port

of Baltimore around

1 a.m. on Tuesday.

Where impact occurred

Direction of the ship

The ship hit the

bridge at 1:28 a.m.

The ship hit the bridge at 1:28 a.m.

Where impact

Source: Spire Global

The New York Times; satellite image by Google Earth

The lights of the ship flickered on and off as it lost power in the minutes before the ship changed bearing and hit the bridge.

Ship approached from

the Port of Baltimore

Road repair crews

Ship changed heading

as it neared pillar

Ship hit pillar

Southern and central spans

of bridge began to collapse within

seconds of impact

Northern span began to

collapse seconds later

Within 30 seconds of impact,

the central part of bridge had

entirely collapsed.

Source: StreamTime Live via YouTube

Timestamps are from StreamTime Live video.

The New York Times

The Francis Scott Key Bridge was opened in 1977 and carried more than 12.4 million vehicles last year. The bridge was one of the three major ways to cross the Patapsco River and formed part of Baltimore’s beltway.

The Port of Baltimore is a major trade hub that handled a record amount of foreign cargo last year. It is an especially important destination — the nation’s largest by volume last year — for deliveries of cars and light trucks.

Ship impact

To Chesapeake Bay

Sources: Maryland Port Administration, OpenStreetMap, MarineTraffic

Note: Ship positions are as of 2:46 p.m. Eastern time.

Overall, Baltimore was the 17th biggest port in the United States in 2021, ranked by total tons, according to the Bureau of Transportation Statistics. The bridge collapse brought marine traffic there to a standstill, with seven cargo or tanker ships stranded in the harbor as of Tuesday afternoon.

Gov. Wes Moore declared a state of emergency for Maryland and said that his office was in close communication with Pete Buttigieg, the U.S. transportation secretary. The White House issued a statement saying that President Biden had been briefed on the collapse.

Erin Schaff/The New York Times

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Claudia Looi

Touring the Top 10 Moscow Metro Stations

By Claudia Looi 2 Comments

Komsomolskaya metro station looks like a museum. It has vaulted ceilings and baroque decor.

Hidden underground, in the heart of Moscow, are historical and architectural treasures of Russia. These are Soviet-era creations – the metro stations of Moscow.

Our guide Maria introduced these elaborate metro stations as “the palaces for the people.” Built between 1937 and 1955, each station holds its own history and stories. Stalin had the idea of building beautiful underground spaces that the masses could enjoy. They would look like museums, art centers, concert halls, palaces and churches. Each would have a different theme. None would be alike.

The two-hour private tour was with a former Intourist tour guide named Maria. Maria lived in Moscow all her life and through the communist era of 60s to 90s. She has been a tour guide for more than 30 years. Being in her 60s, she moved rather quickly for her age. We traveled and crammed with Maria and other Muscovites on the metro to visit 10 different metro stations.

Arrow showing the direction of metro line 1 and 2

Moscow subways are very clean

To Maria, every street, metro and building told a story. I couldn’t keep up with her stories. I don’t remember most of what she said because I was just thrilled being in Moscow.   Added to that, she spilled out so many Russian words and names, which to one who can’t read Cyrillic, sounded so foreign and could be easily forgotten.

The metro tour was the first part of our all day tour of Moscow with Maria. Here are the stations we visited:

1. Komsomolskaya Metro Station  is the most beautiful of them all. Painted yellow and decorated with chandeliers, gold leaves and semi precious stones, the station looks like a stately museum. And possibly decorated like a palace. I saw Komsomolskaya first, before the rest of the stations upon arrival in Moscow by train from St. Petersburg.

2. Revolution Square Metro Station (Ploshchad Revolyutsii) has marble arches and 72 bronze sculptures designed by Alexey Dushkin. The marble arches are flanked by the bronze sculptures. If you look closely you will see passersby touching the bronze dog's nose. Legend has it that good luck comes to those who touch the dog's nose.

Touch the dog's nose for good luck. At the Revolution Square station

Revolution Square Metro Station

3. Arbatskaya Metro Station served as a shelter during the Soviet-era. It is one of the largest and the deepest metro stations in Moscow.

Arbatskaya Metro Station

4. Biblioteka Imeni Lenina Metro Station was built in 1935 and named after the Russian State Library. It is located near the library and has a big mosaic portrait of Lenin and yellow ceramic tiles on the track walls.

Lenin's portrait at the Biblioteka Imeni Lenina Metro Station

5. Kievskaya Metro Station was one of the first to be completed in Moscow. Named after the capital city of Ukraine by Kiev-born, Nikita Khruschev, Stalin's successor.

Kievskaya Metro Station

6. Novoslobodskaya Metro Station  was built in 1952. It has 32 stained glass murals with brass borders.

Novoslobodskaya metro station

7. Kurskaya Metro Station was one of the first few to be built in Moscow in 1938. It has ceiling panels and artwork showing Soviet leadership, Soviet lifestyle and political power. It has a dome with patriotic slogans decorated with red stars representing the Soviet's World War II Hall of Fame. Kurskaya Metro Station is a must-visit station in Moscow.

Ceiling panel and artworks at Kurskaya Metro Station

8. Mayakovskaya Metro Station built in 1938. It was named after Russian poet Vladmir Mayakovsky. This is one of the most beautiful metro stations in the world with 34 mosaics painted by Alexander Deyneka.

Mayakovskaya station

One of the over 30 ceiling mosaics in Mayakovskaya metro station

9. Belorusskaya Metro Station is named after the people of Belarus. In the picture below, there are statues of 3 members of the Partisan Resistance in Belarus during World War II. The statues were sculpted by Sergei Orlov, S. Rabinovich and I. Slonim.

10. Teatralnaya Metro Station (Theatre Metro Station) is located near the Bolshoi Theatre.

Teatralnaya Metro Station decorated with porcelain figures .

Taking the metro's escalator at the end of the tour with Maria the tour guide.

Have you visited the Moscow Metro? Leave your comment below.

January 15, 2017 at 8:17 am

An excellent read! Thanks for much for sharing the Russian metro system with us. We're heading to Moscow in April and exploring the metro stations were on our list and after reading your post, I'm even more excited to go visit them. Thanks again 🙂

December 6, 2017 at 10:45 pm

Hi, do you remember which tour company you contacted for this tour?

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Travelicious

9 Ways Flying First Class Can Actually Save You Money, Travel Experts Say

Posted: October 12, 2023 | Last updated: October 12, 2023

After rebounding from the pandemic's travel lull, people are finally hitting the skies again . Unfortunately, as travel rates have increased, so has the cost of flying. According to a 2023 report from the travel company Kayak, travel costs are currently up 35 percent compared to last year. However, that doesn't mean you can't save money while traveling—even if you plan to book a first-class ticket. We checked in with travel and finance experts who shared their top tips for keeping your money in your wallet the next time you spring for a luxury trip. Read on to learn the nine ways that flying first class can actually save you some money in the long run.

RELATED:  11 Worst Days and Times to Fly on an Airplane .

1 You'll save on baggage expenses.

One way that traveling first class can help save you money is on your luggage. Unlike most coach tickets, first-class tickets regularly include at least one or two checked bags for no extra cost.

"While a first-class ticket might be more expensive, the included amenities can sometimes help you save some money you otherwise would have been spending on things like luggage fees," says Carter Seuthe , CEO of My Credit Summit . "With some first-class tickets, you might find luggage fees waived, so if you're planning to fly with a lot of bags or bags that might be subject to excess fees, you can save some money there."

2 You'll save by accruing more travel points.

If you're using the right credit card, spending more on a first-class ticket can save you money on later trips, says Suzanne Bucknam , an experienced travel expert and CEO of the travel company Connecticut Explorer . "If you use a credit card that helps you accrue points when you fly first class, like the United Mastercard, you accrue more rewards points to be used toward future travel," she explains.

RELATED: 10 Airport Security Secrets TSA Doesn't Want You to Know .

3 You'll save by boosting your airline loyalty benefits.

Similar to the points you can earn with the right credit card, you can also save money while flying first class by staying loyal to one airline. Though this is true of flying coach too, opting for first class will expedite the process.

"Many airlines have loyalty programs that provide perks and benefits to frequent flyers, such as free first-class upgrades," explains Justin Crabbe , CEO of the private jet charter service Jettly . "Travelers who fly with the same airline on a regular basis and accumulate points or miles can potentially save money on future flights by redeeming these rewards."

4 You'll save on the airport lounge.

If you were prepared to shell out money to use the airport lounge, a first-class ticket can often save you that expense.

RELATED:  The Last U.S. Airline to Offer First Class Is Getting Rid of It .

5 You may save by booking through a travel agent.

Sometimes how you book your plane ticket can determine how much you pay for it. "Travel agents frequently have access to discounted first-class fares that the general public does not have," says Crabbe. "Travelers can potentially save money on first-class tickets by using a travel agent or taking advantage of discounted fares."

Additionally, you may be able to save money by booking a first-class ticket over the phone by calling the airline directly, rather than booking online.

6 You'll save on hotels for long layovers.

If the only alternative to a first-class ticket is to have a lengthy layover that requires a hotel stay, you may also be able to save money by spending more upfront. A direct flight could be more cost-effective than combining a flight and hotel, so it's important to compare the total expenditures, rather than just the ticket cost, Kroeger suggests.

7 You'll save if you need to change your itinerary.

Changing your travel plans once you've booked your tickets can be extremely costly. Compared to flying coach, first-class tickets tend to be more flexible, says Gareth Boyd , co-founder of Frequent Flyer Credit Cards .

RELATED: Unfair Perks: Plane Passenger Shows How Extreme Turbulence Hits Different in First Class .

8 You'll save by getting a last-minute upgrade.

Another way you can save while flying first class is by going for a last-minute upgrade or flying standby.

"Airlines hate to have unsold seats and will gladly give steep discounts to standby flyers to take any open seat on the plane—including first-class seats," says Ann Martin , the director of operations for CreditDonkey . "This is, admittedly, a gamble, but it's one that can pay off, and even if you don't get a first-class ticket, you're still getting a good deal."

9 You'll save time—and time is money.

For more travel tips sent directly to your inbox, sign up for our daily newsletter .

Read the original article on Best Life .

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NASA issues urgent solar eclipse safety warning ahead of celestial event

The 2024 total solar eclipse is 1 week away. Here's what you need to know.

We're ready, are you? The countdown to the total solar eclipse has begun!

Last minute preparations

Eclipse weather.

There's only one week left until the total solar eclipse 2024 is visible across North America! Are you ready? 

Memories will be made when the moon crosses in front of the sun and turns the daytime sky dark. The total solar eclipse will travel through Mexico, 15 U.S. States and Canada and will be one of the most-watched eclipses ever. You can view the entire path of totality including start and end times for different stages of the solar ellipse at each location in this helpful interactive map from NASA . 

If you cannot watch the eclipse in person you can watch the total solar eclipse live here on Space.com courtesy of NASA. Coverage will begin at 1 p.m. EDT (1700 GMT) . You can also keep up with all the actions with our total solar eclipse 2024 live updates blog.

And if you capture a great photo of the solar eclipse and would like to share it with us and our readers, please email it to [email protected] .  

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Our how to read and understand a solar eclipse map will help you get the most out of your eclipse viewing venture!

By now you've most likely decided on a viewing location and have all the supplies needed for a successful eclipse viewing experience (don't forget those eclipse glasses !). 

But if you're still scrambling for some solar-safe viewing equipment and haven't been able to get hold of a pair of eclipse glasses don't worry, we've got some alternative ways to view the eclipse with items from around the home . 

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If you're looking for a way to entertain the little ones before, during and after the eclipse we've got a great guide on how to organize an eclipse event for kids . 

As we get closer to April 8, more reliable meteorological weather forecasts will become available. NOAA's Weather Prediction Center is a great place to find increasingly reliable forecasts, which can help you decide on a viewing location where the probability of cloud cover is low. While we are all wishing for clear skies, we can't help but wonder how clouds could impact the viewing experience. It turns out a cloudy forecast might not be as bad as you would initially think, as it all depends on the type, thickness and extent of the cloud cover. You can read more about what happens if it's cloudy during the eclipse and how to give yourself the best chance of clear skies in our helpful guides 

With so many people flocking to watch the eclipse safety is the top priority. Here we've compiled a couple of guides on How to stay safe during the eclipse and also how to avoid getting stuck in traffic on the big day.

Everyone observing the partial phases of this eclipse — and for those outside the path of totality, that's the entire event — will need to wear solar eclipse glasses while cameras, telescopes and binoculars will need solar filters placed in front of their lenses. 

Only those in the path of totality will be able to remove them briefly to see the sun's corona with their naked eyes. Those not in the path of totality must keep them on the entire time. Our how to observe the sun safely guide tells you everything you need to know about safe solar observations.

Solar eclipse glasses are crucial for most to safely observe the eclipse, but with such high demand for the vital piece of kit, fake eclipse glasses are rife. The American Astronomical Society (AAS) is warning people about the risks of counterfeit and knock-off solar glasses so we have come up with a guide to how to check yours are safe . 

Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at: [email protected].

Daisy Dobrijevic joined Space.com in February 2022 having previously worked for our sister publication All About Space magazine as a staff writer. Before joining us, Daisy completed an editorial internship with the BBC Sky at Night Magazine and worked at the National Space Centre in Leicester, U.K., where she enjoyed communicating space science to the public. In 2021, Daisy completed a PhD in plant physiology and also holds a Master's in Environmental Science, she is currently based in Nottingham, U.K. Daisy is passionate about all things space, with a penchant for solar activity and space weather. She has a strong interest in astrotourism and loves nothing more than a good northern lights chase! 

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Here's who could be responsible for paying for the Baltimore bridge disaster

• The Francis Scott Key Bridge in Baltimore collapsed after a container ship collided with it.
• Several entities could be on the hook to foot the bill in the aftermath of the disaster.
• The maritime insurance industry will likely be saddled with the highest costs. 

The Francis Scott Key Bridge in Baltimore collapsed on Tuesday after a large container ship ran into it, leading to six presumed deaths and millions of dollars in possible damage.

It's still too early to estimate the total economic impact of the disaster, but between the cost of rebuilding the decades-old bridge, compensating the victims' families , and paying out damages for disruptions to the supply chain, the eventual cost of the disaster is expected to be significant.

Who will pay to rebuild the bridge?

President Joe Biden said on Tuesday the federal government should be responsible for paying to reconstruct the damaged Francis Scott Key Bridge.

"It is my intention that the federal government will pay for the entire cost of reconstructing that bridge, and I expect Congress to support my effort," Biden said.

The bridge was built in the 1970s for about $60 million, but the cost of rebuilding it could be 10 times its original price tag, an engineering expert told Sky News. 

Baltimore is among the busiest ports in the nation , with more than a million shipping containers passing through each year. The collapse — which closed the port to all maritime and most road traffic until further notice — is already beginning to wreak havoc on the supply chain.

The cost of building the bridge back fast enough to offset diversions as much as possible could saddle the government with a more than $600 million bill, David MacKenzie, the chair of the engineering and architecture consultancy COWIfonden, told Sky News.

Who will pay for damages to the ship and its cargo?

The container ship, the Dali , is owned by a Singapore-based firm. The ship's charterer, Maersk, confirmed to Business Insider that vessel company Synergy Group operates the ship. 

However, the companies with cargo aboard the Dali could ultimately be responsible for some of the ship's damages and cargo costs, according to Ryan Petersen , the CEO of the supply-chain-logistics company Flexport, which had two containers on the ship.

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The Dali was carrying 330 containers that must now be rerouted, Petersen said in an X thread.

An ancient maritime law known as " general average " dictates that companies with even a single container aboard a ship split certain damages pro rata based on the number of containers they had on board, ensuring all the stakeholders benefiting from the voyage are splitting the risk, Petersen said.

General average situations can occur when a ship is stranded or when cargo is damaged or thrown overboard to save the vessel, according to Flexport . The concept helps ensure that all parties who have a vested interest in the vessel share the cost and concern of protecting it.

It's too soon to know whether damages incurred to free the Dali in the coming days will qualify as a case of general average.

Who will pay for everything else?

The majority of the financial fallout is likely to lay primarily with the insurance industry, according to media reports.

Industry experts told the Financial Times that insurers could pay out losses for bridge damage, port disruption, and any loss of life.

The collapse could drive "one of the largest claims ever to hit the marine (re)insurance market," John Miklus, the president of the American Institute of Marine Underwriters, told Insurance Business.

He told the outlet that the loss of revenue from tolls while the bridge is being rebuilt will be expensive, as will any liability claims from deaths or injuries.

The Dali is covered by the Britannia Steam Ship Insurance Association Ltd., known as Britannia P&I Club, according to S&P Global Market Intelligence.

In a statement to Business Insider, Britannia said it was "working closely with the ship manager and relevant authorities to establish the facts and to help ensure that this situation is dealt with quickly and professionally."

Britannia is one of 12 mutual insurers included in the International Group of P&I Clubs, which maintains more than $3 billion of reinsurance cover, sources familiar with the matter told Insurance Business.

Britannia itself is liable for the first $10 million in damages, both FT and Insurance Business reported. Whatever remains is dealt with by the wider mutual insurance group and Lloyd's of London, a reinsurance market in the UK, the FT reported.

Update: March 28, 2024 — This story has been updated to include additional information about general average and clarify that it is too soon to know whether general average will apply in the case of the Dali.

Watch: The container ship that destroyed the Francis Scott Key Bridge has crashed before

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