Columbia Pike–Pentagon Line
| Company type | Public transit route |
|---|---|
| Industry | Public transportation |
| Predecessor | Alexandria, Barcroft and Washington Transit Company (AB&W) |
| Founded | 1921 |
| Headquarters | Arlington, Virginia , United States |
Area served | Fairfax County and Arlington County, Virginia |
| Products | Bus service |
| Parent | Washington Metropolitan Area Transit Authority |
The Columbia Pike–Pentagon Line, designated as Route F44, is a daily transit route managed by the Washington Metropolitan Area Transit Authority. This service links the community of Annandale, Virginia with the Pentagon station, which is served by the Yellow and Blue lines of the Washington Metro system. As a component of the Pike Ride initiative along Virginia State Route 244, this route caters to prominent residential districts within Fairfax County and Arlington County, facilitating convenient access to retail centers, workplaces, and commercial establishments situated along Columbia Pike.
Route description and service
Operating every day from the Four Mile Run Division, the F44 bus travels between Annandale and Pentagon station, traversing the full length of Columbia Pike. It serves several neighborhoods such as Lincolnia, Bailey's Crossroads, Barcroft, Arlington Heights, and Penrose, making local stops throughout its path.
F44 stops
<section begin=f44-table/>
| Bus stop | Direction | Connections |
|---|---|---|
| Arlington, Virginia | ||
| Pentagon Station Bus Bay U10 |
Eastbound Terminal, Westbound station |
Template:Bus icon Arlington Transit: 42, 87, 87A, 87P, 87X Template:Bus icon Metrobus: A11, A25, A27, A28, A90, F28, F29, F81, F83, 28F, 29G Template:Bus icon DASH: 35, 103, 104 Template:Bus icon Fairfax Connector: 306, 393, 394, 395, 599, 698, 834, 835 Template:Bus icon Loudoun County Transit Template:Bus icon PRTC OmniRide Template:Rint Washington Metro: Template:WMATA icon Template:WMATA icon |
| Army Navy Drive / South Eads Street | Westbound | Template:Bus icon Arlington Transit: 42, 87, 87A, 87P Template:Bus icon Metrobus: A11 |
| Army Navy Drive / South Fern Street | Westbound | Template:Bus icon Arlington Transit: 42, 87, 87A, 87P Template:Bus icon Metrobus: A11 |
| Army Navy Drive / South Hayes Street | Westbound | Template:Bus icon Arlington Transit: 42, 87, 87A, 87P Template:Bus icon Metrobus: A11, A40 |
| Army Navy Drive / South Joyce Street | Westbound | Template:Bus icon Arlington Transit: 42, 87, 87A, 87P Template:Bus icon Metrobus: A11, A40 |
| Columbia Pike / South Joyce Street | Bidirectional | Template:Bus icon Arlington Transit: 42 Template:Bus icon Metrobus: A40 |
| United States Air Force Memorial | Bidirectional | Template:Bus icon Arlington Transit: 42 Template:Bus icon Metrobus: A40 |
| Columbia Pike / South Orme Street | Bidirectional | Template:Bus icon Arlington Transit: 42 Template:Bus icon Metrobus: A40 |
| Columbia Pike / South Rolfe Street | Westbound | Template:Bus icon Arlington Transit: 42 Template:Bus icon Metrobus: A40 |
| Columbia Pike / South Scott Street | Bidirectional | Template:Bus icon Arlington Transit: 42 Template:Bus icon Metrobus: A40 |
| Columbia Pike / South Courthouse Road | Bidirectional | Template:Bus icon Arlington Transit: 42, 45 Template:Bus icon Metrobus: A40 |
| Columbia Pike / South Barton Street | Bidirectional | Template:Bus icon Arlington Transit: 45 Template:Bus icon Metrobus: A40, A49 |
| Columbia Pike / Walter Reed Drive | Bidirectional | Template:Bus icon Arlington Transit: 45 Template:Bus icon Metrobus: A12, A40, A49 |
| Columbia Pike / South Highland Street | Bidirectional | Template:Bus icon Metrobus: A40, A49 |
| Columbia Pike / South Glebe Road | Bidirectional | Template:Bus icon Arlington Transit: 41, 45 Template:Bus icon Metrobus: A40, A49, A70 |
| Columbia Pike / South Monroe Street | Eastbound | Template:Bus icon Arlington Transit: 41, 45 Template:Bus icon Metrobus: A40, A49 |
| Columbia Pike / South Oakland Street | Bidirectional | Template:Bus icon Arlington Transit: 41 Template:Bus icon Metrobus: A40, A49 |
| Columbia Pike / South Quincy Street | Bidirectional | Template:Bus icon Arlington Transit: 41 Template:Bus icon Metrobus: A40, A49 |
| Columbia Pike / South George Mason Drive | Bidirectional | Template:Bus icon Arlington Transit: 41 Template:Bus icon Metrobus: A40, A49, A71 |
| Columbia Pike / South Thomas Street | Bidirectional | Template:Bus icon Arlington Transit: 41 Template:Bus icon Metrobus: A40, A49, A71 |
| Columbia Pike / South Buchanan Street (Westbound) / South Four Mile Run Drive (Eastbound) | Bidirectional | Template:Bus icon Arlington Transit: 41 Template:Bus icon Metrobus: A40, A49, A71 |
| Columbia Pike / South Columbus Street (Westbound) / South Dinwiddie Street (Eastbound) | Bidirectional | Template:Bus icon Arlington Transit: 41, 45, 75 Template:Bus icon Metrobus: A40, A49 |
| Columbia Pike / South Frederick Street | Bidirectional | Template:Bus icon Arlington Transit: 41, 45, 75 Template:Bus icon Metrobus: A40, A49 |
| Columbia Pike / South Greenbrier Street | Bidirectional | Template:Bus icon Arlington Transit: 41, 45 Template:Bus icon Metrobus: A40, A49 |
| Columbia Pike / South Jefferson Street | Bidirectional | Template:Bus icon Arlington Transit: 45 Template:Bus icon Metrobus: A40, A49 |
<section end=f44-table/>
History
Since September 7, 2003, this line has been integrated into the Pike Ride network. Originally called the Columbia Pike Line, it began as the inaugural route of the Alexandria, Barcroft and Washington Transit Company (AB&W) in 1921. WMATA assumed control of all AB&W routes in 1973. Between 1973 and 2025, the Columbia Pike Line included a total of sixteen routes, which were eventually divided into related lines operating along the same corridor. The number 16 line provided high-quality, dependable transit linking residential areas, commercial districts, landmarks, and business hubs. Initially extending service to Washington Union Station, all routes were truncated to terminate at Pentagon station on June 26, 1983.
Building on WMATA’s success with route 16, Arlington Transit expanded its Columbia Pike services by introducing Route 41. Daily operations were offered on routes 16B and 16J, while routes 16A, 16D, and 16F operated exclusively on weekdays. Aside from routes 16F and 16J, the majority ran between Pentagon station and Annandale. The 16B route served Culmore during weekday peak periods and extended to Annandale during weekends. Late-night service via Pentagon City was covered by route 16E. Route 16F operated only during peak hours, linking Pentagon Station in the mornings with Culmore in the afternoons, featuring limited stops within Arlington County.
In 2008, route 16P was added to the Columbia Pike Line to replace route 16J’s Sunday service. The following year saw a reduction in Sunday trips for route 16B to Annandale, with some rush hour trips terminating at Culmore on weekdays. In 2010, route 16F was rebranded as the Columbia Pike–Federal Triangle Line. Routes 16L and 16G were once components of the Columbia Pike Line but underwent rebranding: in 1987, route 16L became the Annandale–Skyline City–Pentagon Line while maintaining connections with route 16A; in September 2003, route 16G was reassigned to create the Columbia Pike–Pentagon City Line under the Pike Ride initiative. Notably, WMATA reused the number 16C twice—initially discontinued in 2003 and later reintroduced in a modified form in 2018 on the Columbia Pike Line.
Service changes
The Columbia Pike Line has experienced numerous adjustments over time, beginning with renaming route 16L as the Columbia Pike Express Line. Various routes within the number 16 series have been modified throughout their operation.
In response to security concerns following the September 11 attacks, route 16 and other lines serving Pentagon station were temporarily rerouted to Pentagon City station; service to Pentagon resumed on December 16, 2001.
Route 16C was eliminated on September 7, 2003; its coverage was taken over by routes 16B, 16F, and 16J. Route 16F transitioned into a limited-stop service within Arlington County. Meanwhile, route 16G was incorporated into the newly formed Columbia Pike–Pentagon City Line alongside routes 16H, 16K, and 16W to serve Skyline City (Fairfax County) and Barcroft (Arlington County).
In WMATA’s FY2011 budget proposals, off-peak trips for routes 16A, B, D, J, and P were suggested to be rerouted via Pentagon City station and rebranded as routes 16C and 16M during off-peak hours while maintaining route 16P. Additionally, an extension of route 16F during weekday peak hours into Downtown Washington D.C. was proposed to replace routes 13A and 13B from the National Airport–Pentagon–Washington Line.
Route 16F was reassigned to become part of the Columbia Pike–Federal Triangle Line with an extension into Federal Triangle in D.C., continuing limited-stop service within Arlington and all-stop service in D.C., operating until its redesignation as route 16X in 2012.
On March 29, 2015, route 16D was discontinued and replaced by route 16A; its Annandale segment was absorbed by route 16L.
Responding to earlier Metrorail closures, on December 18, 2016, route 16E was extended from Pentagon station to Franklin Square in Downtown Washington D.C.
To streamline operations on June 24, 2018, routes 16B, 16J, and 16P were discontinued and replaced by routes 16A, 16C, and 16E respectively. Portions of these discontinued routes were taken over by route 16H from the Columbia Pike–Pentagon City Line. Daily service was introduced on route 16A. After a hiatus of fifteen years, route 16C returned to the Columbia Pike Line and took over former route 16X service to Federal Triangle. Routes 16A and 16C provide limited-stop service along Columbia Pike in Arlington County; meanwhile routes 16E, 16G, and 16H serve all stops.
During the COVID-19 pandemic period beginning March 18, 2020, service was reduced to a Saturday Supplemental Schedule with suspension of federal triangle service on route 16C. Weekend frequency for route 16C dropped to every thirty minutes; weekend operations for routes 16A and 16E were paused. Full service resumed August 23, 2020 except for route 16C’s Federal Triangle segment.
WMATA’s FY2021 budget proposal suggested eliminating route 16C’s Downtown DC segment due to redundancy with Blue and Yellow Metrorail Lines; full elimination of route 16E was also proposed alongside restoration of late-night Metrorail services.
On September 10, 2020 (FY2022 budget), WMATA proposed truncating route 16C at Pentagon station citing funding limitations and reducing weekend frequency across all line routes. Weeknight schedule for route 16E remained unchanged except for removal of trips after midnight. Route 16C has not served Federal Triangle since March 13, 2020.
Service frequency increased on September 5, 2021: several routes including Columbia Pike–National Landing Line’s routes 16G and 16H operated every twelve minutes between seven AM and nine PM; however Federal Triangle service by route 16C remained discontinued.
Due to rising Omicron variant cases later that year weekday schedules reverted temporarily to Saturday frequencies but full weekday service resumed February 7, 2022.
As part of WMATA’s Better Bus Redesign effective June 29, 2025 significant restructuring took place: route 16A was renamed F44 maintaining similar routing but removing limited-stop segments along Columbia Pike; routes 16C and 16E merged with Columbia Pike–National Landing Line’s route A40 (formerly route １６M). Service to Culmore shifted to new routes A49 (a modified former route １６Y) and A58 (a modified former routes 22A/22F).