# Oxon Hill–Suitland Line

The Oxon Hill–Suitland Line, designated Routes D12 & D14, are daily bus routes operated by the Washington Metropolitan Area Transit Authority between Southern Avenue station and Suitland station of the Green Line of the Washington Metro. The D12 operates every 20 minutes between 7AM and 9PM and 60 minutes after 9PM while the D14 operates every 24–30 minutes during the peak hours and every 60 minutes all other times. Trips roughly take 60 minutes (D12) or 70–80 minutes (D14).

## Background

Routes D12 and D14 operate between Southern Avenue station and Suitland station mainly connecting riders along Saint Barnabas Road for the D12, and Brinkley Road, Allentown Road, and Indian Head Highway for route D14. Routes D12 and D14 operate daily. Route D14 follows much of the D12 routing except skipping the D12 routing along Audrey Lane, Deal Drive, Marcy Avenue and Livingston Terrace.
Routes D12 and D14 currently operate out of Andrews Federal Center garage full-time with select peak-hour trips operating out of Shepherd Parkway garage. The line formally operated out of Southern Avenue garage on weekdays and Shepherd Parkway on weekends.

### D12 Stops

| Bus stop | Direction | Connections |
| Prince George's County, Maryland |||
| Southern Avenue station Bus Bay P | Eastbound station, Westbound terminal | Metrobus: 32, A2, A32, D14, NH1, P12, P18, W1, W2, W14 TheBus: 33, 35, 37 Washington Metro: |
| Southern Avenue / #1380 | Bidirectional | Metrobus: A2, D14, NH1, P12, W2 TheBus: 33, 35, 37 |
| Southern Avenue / United Medical Center | Eastbound | Metrobus: A2, D14, NH1, P12, W2 TheBus: 33, 35, 37 |
| Southern Avenue / Forest Hills Apartments | Westbound | Metrobus: A2, D14, NH1, P12, W2 TheBus: 33, 35, 37 |
| Southern Avenue / 13th Street SE | Bidirectional | Metrobus: A2, D14, NH1, P12, P18, W2, W14 TheBus: 33, 35, 37 |
| Southern Avenue / Wheeler Road | Bidirectional | Metrobus: A2, A6, A7, D14, NH1, P12 TheBus: 33, 35, 37 |
| Southern Avenue / 9th Street SE | Bidirectional | Metrobus: A6, A7, D14, NH1, P12 TheBus: 33, 35, 37 |
| Southern Avenue / Chesapeake Street SE | Bidirectional | Metrobus: A6, A7, D14, NH1, P12, P18, W14 TheBus: 33, 35, 37 |
| Southern Avenue / Robert L. Yeldell Towers | Bidirectional | Metrobus: A6, A7, D14 TheBus: 33, 35, 37 |
| Southern Avenue / Owens Road | Bidirectional | Metrobus: A6, A7, D14 TheBus: 33, 35, 37 |
| Southern Avenue / Barnaby Street SE | Bidirectional | Metrobus: A6, A7, D14 TheBus: 35, 37 |
| Southern Avenue / 6th Street SE | Bidirectional | Metrobus: A6, A7, A8, D14, P18, W14 TheBus: 35, 37 |
| Southern Avenue / South Capitol Street | Westbound | Metrobus: A6, A7, A8, D14, P18, W14 TheBus: 35, 37 |
| Indian Head Highway / Southern Avenue | Bidirectional | Metrobus: A6, A7, A8, D14, P18, W14 TheBus: 35, 37 |
| Audrey Lane / Neptune Avenue | Bidirectional | Metrobus: P12 |
| Audrey Lane / #632 | Westbound | Metrobus: P12 |
| Audrey Lane / Deal Drive | Eastbound | Metrobus: P12 |
| Deal Drive / Audrey Lane | Westbound | Metrobus: P12 |
| Deal Drive / Kennebec Street | Westbound | Metrobus: P12 |
| Deal Drive / Dunster Drive | Bidirectional | |
| Deal Drive / Marcy Avenue | Eastbound | |
| Marcy Avenue / Neptune Avenue | Westbound | |
| Marcy Avenue / Leverett Street | Eastbound | |
| Livingston Terrace / #5501-#5507 | Eastbound | |
| Livingston Terrace / Livingston Road | Westbound | |
| Livingston Road / Livingston Terrace | Westbound | |
| Livingston Road / Shawnee Drive | Eastbound | |
| Birchwood Drive / Livingston Road | Bidirectional | |
| Birchwood Drive / Dunwoody Avenue | Bidirectional | |
| Birchwood Drive / Fountain Road | Bidirectional | |
| Birchwood Drive / Galloway Drive | Bidirectional | |
| Birchwood Drive / Birchwood Court | Bidirectional | |
| Birchwood Drive / Fenwood Avenue | Bidirectional | |
| Helmont Drive / Fenwood Avenue | Bidirectional | |
| Helmont Drive / Ironton Drive | Bidirectional | |
| Helmont Drive / Clearview Avenue | Bidirectional | |
| Helmont Drive / Dundalk Drive | Bidirectional | |
| Galloway Drive / Fenwood Avenue | Bidirectional | |
| Galloway Drive / Colony Road | Bidirectional | |
| Livingston Road / Comanche Drive | Bidirectional | |
| Livingston Road / Oxon Hill Road | Bidirectional | Metrobus: NH1, W14 TheBus: 35 |
| Oxon Hill Road / Riverside Plaza Apartments | Bidirectional | Metrobus: NH1 TheBus: 35 |
| Oxon Hill Road / #6188 | Eastbound | Metrobus: NH1 TheBus: 35 |
| Oxon Hill Road / Rivertowne Commons Market Place | Westbound | Metrobus: NH1 TheBus: 35 |
| Oxon Hill Road / John Hanson Lane | Bidirectional | Metrobus: NH1 TheBus: 35 |
| St. Barnabas Road / Alice Avenue | Bidirectional | Metrobus: NH1 |
| Silver Hill Road / Larry Avenue | Eastbound | Metrobus: NH1 |
| St. Barnabas Road / Rosecroft Village Drive | Westbound | Metrobus: NH1 |
| St. Barnabas Road / #5401 | Westbound | Metrobus: NH1 |
| St. Barnabas Road / Arts Drive | Eastbound | Metrobus: NH1 |
| St. Barnabas Road / Wheeler Road | Westbound | TheBus: 33 |
| St. Barnabas Road / Winston Street | Eastbound | TheBus: 33 |
| St. Barnabas Road / Frazier Terrace | Bidirectional | TheBus: 33 |
| St. Barnabas Road / St. Barnabas Church | Westbound | TheBus: 33 |
| St. Barnabas Road / Frazier Drive | Eastbound | TheBus: 33 |
| St. Barnabas Road / Lime Street | Westbound | TheBus: 33 |
| St. Barnabas Road / Kernal Lane | Eastbound | TheBus: 33 |
| St. Barnabas Road / Hagan Road | Bidirectional | TheBus: 33 |
| St. Barnabas Road / Temple Lane | Bidirectional | TheBus: 33 |
| St. Barnabas Road / Temple Hill Road | Eastbound | Metrobus: H12 TheBus: 32, 33 |
| St. Barnabas Road / Raleigh Road | Westbound | Metrobus: H12 TheBus: 32, 33 |
| St. Barnabas Road / Pohanka Place | Bidirectional | Metrobus: H12 |
| St. Barnabas Road / Clifton Road | Bidirectional | Metrobus: H12 |
| St. Barnabas Road / Stamp Road | Bidirectional | Metrobus: H12 |
| St. Barnabas Road / Holly Tree Road | Eastbound | Metrobus: H12 |
| St. Barnabas Road / Leisure Drive | Westbound | Metrobus: H12 |
| St. Barnabas Road / 28th Avenue | Westbound | Metrobus: H12 |
| 28th Avenue / St. Barnabas Road | Bidirectional | Metrobus: C12, C14, H12 |
| 28th Avenue / Riviera Street | Bidirectional | |
| 28th Avenue / #4219 | Bidirectional | |
| 28th Avenue / St. Clair Drive | Bidirectional | Metrobus: H12 TheBus: 32 |
| 28th Avenue / Keith Street | Bidirectional | Metrobus: H12 TheBus: 32 |
| Keith Street / Triton Court | Bidirectional | Metrobus: H12 |
| Marlow Heights Shopping Center / #3927 | Bidirectional | Metrobus: C12, C14, H12 |
| Marlow Heights Shopping Center / Macy's | Bidirectional | Metrobus: C12, C14, H12 |
| Marlow Heights Shopping Center / 28th Avenue | Bidirectional | Metrobus: C12, C14, H12 |
| St. Barnabas Road / Bedford Way | Bidirectional | Metrobus: C12, C14 |
| St. Barnabas Road / Wilkinson Drive | Bidirectional | |
| St. Barnabas Road / Silver Hill Road | Bidirectional | Metrobus: P12 |
| Silver Hill Road / Silver Park Drive | Bidirectional | Metrobus: P12 |
| Silver Hill Road / Terrace Drive | Bidirectional | Metrobus: P12 |
| Silver Hill Road / Maywood Lane | Bidirectional | Metrobus: P12 |
| Suitland Station Roadway / Suitland Federal Center | Eastbound | Metrobus: D14, K12, P12, V12 TheBus: 34 |
| Suitland station Bus Bay H | Westbound station, Eastbound terminal | Metrobus: D14, K12, P12, V12 TheBus: 34 MTA Maryland Bus: 735, 850 Washington Metro: |

### D14 Stops

| Bus stop | Direction | Connections |
| Prince George's County, Maryland |||
| Southern Avenue station Bus Bay Q | Eastbound station, Westbound terminal | Metrobus: 32, A2, A32, D12, NH1, P12, P18, W1, W2, W14 TheBus: 33, 35, 37 Washington Metro: |
| Southern Avenue / #1380 | Bidirectional | Metrobus: A2, D12, NH1, P12, W2 TheBus: 33, 35, 37 |
| Southern Avenue / United Medical Center | Eastbound | Metrobus: A2, D12, NH1, P12, W2 TheBus: 33, 35, 37 |
| Southern Avenue / Forest Hills Apartments | Westbound | Metrobus: A2, D12, NH1, P12, W2 TheBus: 33, 35, 37 |
| Southern Avenue / 13th Street SE | Bidirectional | Metrobus: A2, D12, NH1, P12, P18, W2, W14 TheBus: 33, 35, 37 |
| Southern Avenue / Wheeler Road | Bidirectional | Metrobus: A2, A6, A7, D12, NH1, P12 TheBus: 33, 35, 37 |
| Southern Avenue / 9th Street SE | Bidirectional | Metrobus: A6, A7, D12, NH1, P12 TheBus: 33, 35, 37 |
| Southern Avenue / Chesapeake Street SE | Bidirectional | Metrobus: A6, A7, D12, NH1, P12, P18, W14 TheBus: 33, 35, 37 |
| Southern Avenue / Robert L. Yeldell Towers | Bidirectional | Metrobus: A6, A7, D12 TheBus: 33, 35, 37 |
| Southern Avenue / Owens Road | Bidirectional | Metrobus: A6, A7, D12 TheBus: 33, 35, 37 |
| Southern Avenue / Barnaby Street SE | Bidirectional | Metrobus: A6, A7, D12 TheBus: 35, 37 |
| Southern Avenue / 6th Street SE | Bidirectional | Metrobus: A6, A7, A8, D12, P18, W14 TheBus: 35, 37 |
| Southern Avenue / South Capitol Street | Westbound | Metrobus: A6, A7, A8, D12, P18, W14 TheBus: 35, 37 |
| Indian Head Highway / Southern Avenue | Bidirectional | Metrobus: A6, A7, A8, D12, P18, W14 TheBus: 35, 37 |
| Indian Head Highway / Audrey Lane | Bidirectional | Metrobus: P12, P18, W14 TheBus: 35, 37 |
| Indian Head Highway / Talbert Drive | Eastbound | Metrobus: P18, W14 TheBus: 37 |
| Indian Head Highway / Livingston Road | Westbound | Metrobus: P18, W14 TheBus: 37 |
| Indian Head Highway / Seneca Drive | Eastbound | Metrobus: P18, W14 TheBus: 37 |
| Indian Head Highway / Tecumseh Drive | Eastbound | Metrobus: P18, W14 TheBus: 37 |
| Indian Head Highway / I-95, I-495 | Westbound | Metrobus: P18, W14 TheBus: 37 |
| Oxon Hill Park & Ride Lot Bus Bay C | Bidirectional | Metrobus: NH1, NH2, P18 TheBus: 35, 35S |
| Oxon Hill Road / Harborview Avenue | Bidirectional | Metrobus: NH1, NH2, P18 TheBus: 35, 35S |
| Oxon Hill Road / Oxon Hill Manor | Southbound | Metrobus: P18 TheBus: 35S |
| Oxon Hill Road / Tanger Outlets Main Entrance | Northbound | Metrobus: P18 TheBus: 35S |
| Oxon Hill Road / Pipers Glen Lane | Southbound | Metrobus: P18 |
| Oxon Hill Road / Brockton Road | Northbound | Metrobus: P18 |
| Oxon Hill Road / Abbington Drive | Bidirectional | Metrobus: P18 |
| Oxon Hill Road / Claudia Drive | Bidirectional | Metrobus: P18 |
| Indian Head Highway Service Road / Wilson Towers Apartments | Bidirectional | TheBus: 37 |
| Livingston Road / Murray Hill Drive | Westbound | |
| Livingston Road / #7916 | Eastbound | |
| Livingston Road / Carey Branch Drive | Eastbound | |
| Livingston Road / Hart Road | Bidirectional | |
| Livingston Road / Elwin Road | Bidirectional | |
| Livingston Road / Broderick Drive | Westbound | |
| Livingston Road / Busit Avenue | Eastbound | |
| Livingston Road / White Oak Drive | Bidirectional | |
| Lindsay Road / Jarrett Avenue | Bidirectional | |
| Lindsay Road / Wilmette Drive | Eastbound | |
| Leyte Drive / Lindsay Road | Westbound | |
| Leyte Drive / #6902 | Eastbound | |
| Leyte Drive / #6903 | Westbound | |
| Leyte Drive / Shelby Drive | Bidirectional | |
| Wentworth Drive / Haven Avenue | Bidirectional | |
| Wentworth Drive / #1123 | Westbound | |
| Wentworth Drive / Devonshire Drive | Eastbound | |
| Wentworth Drive / Westfield Drive | Westbound | |
| St. Barnabas Road / Tucker Road | Bidirectional | |
| St. Barnabas Road / Bock Road | Bidirectional | Metrobus: W14 TheBus: 35 |
| St. Barnabas Road / Careyhurst Drive | Bidirectional | TheBus: 35 |
| St. Barnabas Road / Barrowfield Road | Bidirectional | TheBus: 35 |
| St. Barnabas Road / John Hanson Lane | Eastbound | TheBus: 35 |
| Brinkley Road / John Hanson Lane | Westbound | TheBus: 35 |
| Brinkley Road / St. Ignatius Drive | Bidirectional | TheBus: 35 |
| Brinkley Road / #2505 | Eastbound | TheBus: 35 |
| Brinkley Road / Kildare Court | Westbound | TheBus: 35 |
| Glen Rock Avenue / Brinkley Road | Bidirectional | |
| Glen Rock Avenue / Corning Avenue | Bidirectional | |
| Everhart Place / Corning Avenue | Bidirectional | |
| Everhart Place / Henson Creek Manor | Bidirectional | |
| Glen Rock Avenue / Corning Avenue | Bidirectional | |
| Glen Rock Avenue / Brinkley Road | Bidirectional | |
| Brinkley Road / Brinkley Crest Townhouses | Bidirectional | TheBus: 33, 35 |
| Brinkley Road / Huntcrest Condos | Bidirectional | TheBus: 33, 35 |
| Brinkley Road / Huntley Square Drive | Eastbound | TheBus: 33, 35 |
| Brinkley Road / Arbor View Apartments | Westbound | TheBus: 33, 35 |
| Brinkley Road / Cherryfield Road | Eastbound | TheBus: 33, 35 |
| Brinkley Road / Roberts Drive | Westbound | TheBus: 33, 35 |
| Brinkley Road / Middlefield Road | Eastbound | TheBus: 33, 35 |
| Brinkley Road / Morton Place | Westbound | TheBus: 33, 35 |
| Brinkley Road / Trude Street | Bidirectional | TheBus: 33, 35 |
| Brinkley Road / Farmer Drive | Bidirectional | TheBus: 33, 35 |
| Brinkley Road / Temple Hill Road | Bidirectional | TheBus: 32, 33, 35 |
| Temple Hill Road / Cardwell Drive | Bidirectional | TheBus: 33 |
| Temple Hill Road / Farmer Drive | Bidirectional | TheBus: 33 |
| Allentown Road / Temple Hill Road | Bidirectional | TheBus: 30, 33, 35, 37 |
| Allentown Road / #7052 | Bidirectional | TheBus: 30, 33, 35, 37 |
| Allentown Road / Waldran Avenue | Bidirectional | TheBus: 30, 33, 35, 37 |
| Allentown Road / Karen Anne Drive | Southbound | TheBus: 30, 33, 35, 37 |
| Allentown Road / Kingston Drive | Bidirectional | TheBus: 30, 33, 35, 37 |
| Allentown Road / Westchester Drive | Eastbound | TheBus: 30, 33, 35, 37 |
| Allentown Road / Westchester Court | Bidirectional | TheBus: 30, 33, 35, 37 |
| Allentown Road / Coolridge Road | Bidirectional | TheBus: 30, 33, 35, 37 |
| Allentown Road / Brinkley Road | Bidirectional | TheBus: 30, 32, 33, 35, 37 |
| Allentown Road / Allentown Way | Eastbound | Metrobus: C11, C13 TheBus: 30, 33, 37 |
| Old Branch Avenue / Allentown Way | Bidirectional (Short trips only) | Metrobus: C11, C13 TheBus: 30, 32, 33, 37 |
| Allentown Way / Old Branch Avenue | Bidirectional terminal (Short trips only) | Metrobus: C11, C13 TheBus: 30, 32, 33, 37 |
| Allentown Way / #5816 | Bidirectional (Short trips only) | |
| Allentown Road / Perrie Lane | Bidirectional | TheBus: 30 |
| Allentown Road / Robin Lane | Westbound | TheBus: 30 |
| Allentown Road / Leon Street | Eastbound | TheBus: 30 |
| Allentown Road / #5711 | Bidirectional | TheBus: 30 |
| Allentown Road / Maxwell Drive | Westbound | Metrobus: K12 TheBus: 30 |
| Allentown Road / Command Drive Joint Base Andrews (West Gate) | Bidirectional | Metrobus: K12 |
| Allentown Road / Andrews Manor Shopping Center | Bidirectional | Metrobus: K12 |
| Allentown Road / Suitland Road | Westbound | Metrobus: K12 |
| Suitland Road / Allentown Road | Eastbound | Metrobus: K12 |
| Suitland Road / Lou Lane | Eastbound | |
| Suitland Road / Tournament Street | Westbound | |
| Suitland Road / Marianne Drive | Eastbound | |
| Suitland Road / Popular Road | Bidirectional | |
| Suitland Road / Randolph Road | Bidirectional | |
| Suitland Road / Pine Line Drive | Eastbound | |
| Suitland Road / Skyline Terrace | Westbound | |
| Suitland Road / John Street | Westbound | |
| Suitland Road / Skyline Drive | Eastbound | |
| Suitland Road / Woodland Road | Bidirectional | |
| Suitland Road / Kingswood Drive | Eastbound | |
| Suitland Road / #5829-#5897 | Westbound | |
| Suitland Road / Rock Quarry Terrace | Eastbound | |
| Suitland Road / Regency Park Court | Westbound | |
| Suitland Road / Regency Parkway | Bidirectional | |
| Regency Parkway / Rock Quarry Terrace | Eastbound | |
| Regency Parkway / Stoney Meadows Drive | Westbound | |
| Regency Parkway / Andrew Jackson Middle School | Bidirectional | |
| Regency Lane / #5745 | Bidirectional | |
| Hil Mar Drive / Monacco Court | Bidirectional | |
| Hil Mar Drive / Princess Caroline Court | Bidirectional | |
| Hil Mar Drive / Little Hill Lane | Eastbound | |
| Hil Mar Drive / Round Hill Lane | Westbound | |
| Suitland Road / Belgreen Street | Bidirectional | |
| Suitland Road / Romain Court | Bidirectional | |
| Suitland Road / Eastern Lane | Bidirectional | |
| Suitland Road / Silver Hill Road | Eastbound | Metrobus: K12, P12, V12 TheBus: 34 |
| Silver Hill Road / Suitland Road | Eastbound | Metrobus: K12, P12, V12 TheBus: 34 |
| Silver Hill Road / Swann Road | Bidirectional | Metrobus: K12, P12, V12 TheBus: 34 |
| Silver Hill Road / Randall Road | Bidirectional | Metrobus: K12, P12, V12 TheBus: 34 |
| Silver Hill Road / Parkway Terrace Drive | Westbound | Metrobus: K12, P12, V12 TheBus: 34 |
| Suitland Station Roadway / Suitland Federal Center | Eastbound | Metrobus: D12, P12, K12, V12 TheBus: 34 MTA Maryland Bus: 735, 850 |
| Suitland station Bus Bay J | Westbound station, Eastbound terminal | Metrobus: D12, K12, P12, V12 TheBus: 34 MTA Maryland Bus: 735, 850 Washington Metro: |

## History

Routes D12 and D14 was originally operated under the Washington Marlboro & Annapolis Motor Lines Inc. (WM&A) which operated between Eastover Shopping Center and Downtown Washington DC beginning in 1945 (D14) and 1948 (D12). The line was connected via South Capitol Street towards Downtown (11th and E Streets NW). Route D12 originally was named Route D while route D14 was originally named Route M. In 1953 WM&A adopted letter designations for its routes with new routes D12 and D14. In 1973, routes D12 and D14 were acquired by WMATA when they acquired the WM&A.
Later, route D14 would be eliminated, but a new route S12 would be introduced to operate alongside the D12. Route S12 would operate between Southview apartments and Federal Center station while route D12 operate between Marlow Heights and Federal Center station. At the time, the line was run as the Eastover–Marlow Heights Line.
On November 21, 1978, both routes D12 and S12 were shorten to operate between Eastover Shopping Center and Federal Center station. S12 service between Southview Apartments and Eastover was replaced by route P12.
On January 3, 2000, new boarding and alighting restrictions were implemented on route D12. During the AM rush, passengers can get on and off any southbound D12 bus going to Marlow Heights at any bus stop in Maryland and the District of Columbia with restrictions for northbound buses not changing. Passengers can get on and off the bus in Maryland but only get off the bus at stops in the District of Columbia.
During the PM rush, passengers can get on and off northbound buses going to Federal Center SW at any bus stop in Maryland and the District of Columbia with southbound restrictions not changing. Passengers can only get on the bus in the District of Columbia, and get on or off the bus at any stop in Maryland.
On January 13, 2001, when the Green Line extension to Branch Avenue station opened, route D12 was rerouted to operate between Suitland station and Southern Avenue station mainly operating along Saint Barnabas Road, Oxon Hill Road, Indian Head Highway, and Southern Avenue. Buses were also rerouted via 28th Avenue and Keith Street (behind Marlow Heights Shopping Center) and extended from the shopping center to the Suitland station via Branch Avenue and Saint Barnabas and Silver Hill roads.
Routes W11 and W12 from the Eastover–Indian Head Highway Line were also rerouted to operate alongside the D12 between Southern Avenue and Suitland stations and were renamed into routes D13 (W11) and D14 (W12). The line would mainly operate along Suitland Road, Allentown Road, Brinkley Road, Livingston Road, Indian Head Highway, and Southern Avenue. The line also operated via Andrews Air Force Base, as well as the Camp Springs, Temple Hills, and Glassmanor neighborhoods, which former Routes W11, W12, and W17 originally operated on between the Federal Center SW station and Acokeek.
All route S12 service was eliminated in the process being replaced by route D12, and P12.
In 2010 during WMATA's FY2011 budget, WMATA proposed to divert routes D13 and D14 into Oxon Hill Park & Ride Lot off Oxon Hill Road just west of Indian Head Highway in order to create a transfer connection between those routes and the NH1, which serves National Harbor. This would provide closer connections to National Harbor for passengers instead of having to take the Green Line to Branch Avenue station.
Beginning on October 15, 2019, for two years, eastbound D13 and D14 buses were forced to detour due to the Maryland State Highway Administration’s Maryland Route 210 Interchange Project. This prevents buses from turning left from Indian Head Hwy - MD 210 onto Livingston Road. As a result, routes D13 and D14 were forced to backtrack along Indian Head Highway detouring on Wilson Bridge Drive, before resuming its regular route Lindsay Rd at Livingston Rd. A temporary time transfer was also implemented for affected passengers at closed bus stops westbound. Westbound buses were unaffected by the detour.
During the COVID-19 pandemic, route D13 was suspended and routes D12 and D14 was reduced to operate on its Saturday supplemental schedule during the weekdays beginning on March 16, 2020. On March 18, 2020, the line was further reduced to operate on its Sunday schedule. On March 21, 2020, weekend service on the D14 became suspended and Route D12 was reduced to operate every 30 minutes. Service was restored to its full service on August 23, 2020.
In February 2021 during the FY2022 budget, WMATA proposed to eliminate Routes D13 and D14, and propose to extend the D12 to National Harbor to replace the NH1 and eliminate service between Southern Avenue station and Livingston Road & Oxon Hill Road if it did not receive federal funding. However the changes were avoided on March 10, 2021.
Beginning on June 15, 2021, eastbound routes D13 and D14 resumed its regular routing on Livingston Road following the completion of the Maryland State Highway Administration's Maryland Route 210 Interchange Project.
On September 5, 2021, all Route D13 service was renamed to the D14 while D14 service along Livingston Road, Livingston Terrace, Marcy Avenue, Deal Drive, Kennebec Street, Glassmanor Drive, Irvington Street, and Audrey Lane in Glassmanor was eliminated. Service was replaced by Routes D12 and P12 which increased service to every 12 (P12) and 20 (D12) minutes. Between Wilson Bridge Drive and the intersection of Indian Head Highway & Oxon Hill Road, service will operate along Kirby Hill Road and Oxon Hill Road, adding service at Oxon Hill Park & Ride. Service will continue to Wilson Bridge Drive.