{{Short description|Bus route in Maryland and Washington, DC, US}} {{Use mdy dates|date=February 2025}} {{Infobox bus line |box_width = 250px |number = P15, P16 |logo = <!-- bus logo (ex: Image_name.png) --> |logo_width =<!-- width of bus logo --> |logo_alt = <!-- logo image alternate text (only works if logo_width is supplied) --> |bgcolor = <!-- background color for infobox title (hex codes need a '#', i.e. #00ff33 not 00ff33) --> |titlecolor = <!-- color of the title text (hex codes need a '#') --> |subheader = Riggs Road–Adelphi Line<br>Riggs Road–White Oak Line |operatorlogo = Metrobus Logo 2025.svg |oplogo_width = 175px |image = WMATA 2865 P16.jpg |image_width = 250px |image_alt = |caption = Route P16 at Fort Totten station in October 2025 |system = Metrobus |operator = Washington Metropolitan Area Transit Authority |garage = Bladensburg |livery = Local |pvr = |status = In Service |open = R1: 1993<br />R2: 1978<br />P15, P16: June 29, 2025 |close = R8, R9: December 11, 1993<br />R5: June 17, 2012<br />R1, R2: June 29, 2025 |predecessors = |night = |locale = Prince George's County, Montgomery County, Northeast |communities = Calverton, Beltsville, Westfarm, Adelphi, Langley Park, Lewisdale, Hyattsville, Riggs Park, Fort Totten |landmarks = White Oak Adventist Medical Center (P16), High Point High School (P16), Federal Research Center of Adelphi (P16), Presidential Park (P15), 23rd Avenue, Fort Totten station |termini = <!-- used when route starts and stops at a single location, overrides the start and end parameters --> |start = P15: Adelphi<br />P16: White Oak Medical Center |via = Riggs Road |end = Fort Totten station |length = |otherroutes = |compete = |ibus = |level = P15: Weekday Peak Hour Service Only<br />P16: Daily |level1 = |frequency = 20-60 minutes |alt_frequency = |time = |day = 4:30 AM – 12:00 AM |zone = |timetable_link= [https://www.wmata.com/schedules/timetables/upload/R1,2_210905.pdf Riggs Road Line] |ridership = 153,874 (R1, FY 2025)<ref name=ridership>{{cite web | title=Metrobus FY2025 Annual Line Performance Report | website=wmata.com | url=https://www.wmata.com/about/records/upload/ALPR-FY2025_DRAFT_20260107.pdf | access-date=May 9, 2026}}</ref><br/>1,004,062 (R2, FY 2025)<ref name=ridership/> |transfers = SmarTrip only |map_link = |map = |map_state = |map_name = |previous_line = P14 |next_line = P1X |notes = }} The '''Riggs Road Line''', designated as the '''Riggs Road–Adelphi Line''' on '''Route P15''', and '''Riggs Road–White Oak Line''' on '''Route P16''', are bus routes operated by the Washington Metropolitan Area Transit Authority between Fort Totten station of the Red, Green and Yellow Lines of the Washington Metro & Adelphi (P15) or White Oak Medical Center (P16). Routes P15 & P16 operate every 20 minutes during peak hours and route P16 operates every 20 minutes at other times on weekdays, and 30-60 minutes on the weekends. P15 trips are roughly 32 minutes long and P16 trips are roughly 55 minutes long.
== Background == Routes P15 and P16 provide service along Riggs Road between Fort Totten station and Adelphi (P15) or White Oak Adventist Medical Center (P16). Route P15 operates in the weekday peak-hour direction only while route P16 operates daily. The line operates every 10-20 minutes during weekday peak hours, 20-30 minutes at all other times on weekdays, and 30-60 minutes on the weekends.
Routes P15 and P16 operate from Bladensburg division but had some trips operated by Northern division during peak hours until 2018. The line utilized articulated buses due to its high ridership volume.<ref name="RiggsRoad"/>
===P15 stops=== <section begin=p15-table/> {| class="wikitable collapsible collapsed" style="font-size: 95%;" |- !Bus stop !Direction !Connections |- !colspan="5"|Northeast Washington, D.C. |- !Fort Totten station<br /><small>Bus Bay D</small> |'''Northbound station,<br />Southbound terminal''' |{{bus icon}} '''Metrobus''': C71, C77, C81, D30, D44, M60, M6X, P16, P32, P35 <br />{{rint|rail|size=12}} '''Washington Metro''': {{WMATA icon|Red}} {{WMATA icon|Green}} {{WMATA icon|Yellow}} |- !Fort Totten station<br /><small>Bus Bay K</small> |Northbound |{{bus icon}} '''Metrobus''': C71, C77, C81, D30, D44, M60, M6X, P16, P32, P35<br />{{rint|rail|size=12}} '''Washington Metro''': {{WMATA icon|Red}} {{WMATA icon|Green}} {{WMATA icon|Yellow}} |- !First Place NE / Riggs Road NE |Northbound |{{bus icon}} '''Metrobus''': C71, C77, C81, D44, M60, P16 |- !First Place NE / Ingraham Street NE |Southbound |{{bus icon}} '''Metrobus''': C71, C77, C81, D44, M60, P16 |- !Riggs Road NE / South Dakota Avenue NE |Bidirectional |{{bus icon}} '''Metrobus''': C71, P16 |- !Riggs Road NE / Chillum Place NE |Bidirectional |{{bus icon}} '''Metrobus''': C71, M6X, P16 |- !Riggs Road NE / Nicholson Street NE |Bidirectional |{{bus icon}} '''Metrobus''': C71 (Northbound only), P16 |- !Riggs Road NE / 6th Street NE |Southbound |{{bus icon}} '''Metrobus''': P16 |- !colspan="5"|Prince George's County, Maryland |- !Riggs Road / Eastern Avenue |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Chillum Road |Bidirectional |{{bus icon}} '''Metrobus''': P16, P42 |- !Riggs Road / Sheridan Street |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Fairoak Avenue |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Ray Road |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Red Top Road |Southbound |{{bus icon}} '''Metrobus''': P16, P35 |- !Riggs Road / Sargent Road |Northbound |{{bus icon}} '''Metrobus''': P16, P35 |- !Riggs Road / Dayton Road |Bidirectional |{{bus icon}} '''Metrobus''': P16, P35 |- !Riggs Road / East-West Highway |Bidirectional |{{bus icon}} '''Metrobus''': M12, P16, P30, P35 |- !East-West Highway / 19th Place |Northbound |{{bus icon}} '''Metrobus''': M12, P16, P30, P35 |- !East-West Highway / Ager Road |Bidirectional |{{bus icon}} '''Metrobus''': M12, P16, P30, P35 |- !East-West Highway / 23rd Avenue |Southbound |{{bus icon}} '''Metrobus''': M12, P16, P30, P35 |- !23rd Avenue / Sheridan Street |Bidirectional |{{bus icon}} '''Metrobus''': M12, P16, P30, P35<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Woodberry Street |Northbound |{{bus icon}} '''Metrobus''': P16<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Amherst Street |Southbound |{{bus icon}} '''Metrobus''': P16<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Banning Place |Bidirectional |{{bus icon}} '''Metrobus''': P16<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Drexel Street |Bidirectional |{{bus icon}} '''Metrobus''': P16<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Fordham Street |Northbound |{{bus icon}} '''Metrobus''': P16<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Beechwood Street |Southbound |{{bus icon}} '''Metrobus''': P16<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Chapman Road |Northbound |{{bus icon}} '''Metrobus''': P16<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Hannon Street |Southbound |{{bus icon}} '''Metrobus''': P16<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Lewisdale Drive |Northbound |{{bus icon}} '''Metrobus''': P16, P31<br />{{bus icon}} '''TheBus''': P43 |- !University Boulevard / 23rd Avenue |Southbound |{{bus icon}} '''Metrobus''': P16, P31<br />{{bus icon}} '''TheBus''': P43 |- !University Boulevard / Guilford Road |Northbound |{{bus icon}} '''Metrobus''': P16, P31<br />{{bus icon}} '''TheBus''': P43 |- !University Boulevard / Riggs Road |Bidirectional |{{bus icon}} '''Metrobus''': M12, P16, P31<br />{{bus icon}} '''TheBus''': P43<br />{{rint|rail|size=12}} MTA: Purple Line (at Riggs Road station) (Planned) |- !Riggs Road / Jasmine Terrace |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Keokee Street |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Lebanon Street |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Merrimac Drive |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Cool Spring Road |Northbound |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / 20th Avenue |Southbound |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Quebec Street |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Ruatan Street |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Saranac Street |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Apache Street |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Metzerott Road / Greenspire Terrace<br />Adelphi |'''Northbound (PM Peak)<br />Southbound station (AM Peak)''' |{{bus icon}} '''Shuttle-UM''' |- !Metezrott Road / Presidential Towers |Bidirectional |{{bus icon}} '''Shuttle-UM''' |- !Metezrott Road / New Hampshire Avenue |Bidirectional |{{bus icon}} '''Shuttle-UM''' |- !New Hampshire Avenue / Northampton Drive |Bidirectional |{{bus icon}} '''Metrobus''': M60, M6X<br />{{bus icon}} '''Ride On''': 20, 24<br />{{bus icon}} '''TheBus''': P37 |- !New Hampshire Avenue / Adelphi Road |Bidirectional |{{bus icon}} '''Metrobus''': M60<br />{{bus icon}} '''Ride On''': 20, 24<br />{{bus icon}} '''TheBus''': P37<br />{{bus icon}} '''Shuttle-UM''' |- !Adelphi Road / Sierra Street |Bidirectional |{{bus icon}} '''TheBus''': P37 |- !Adelphi Road / 19th Avenue |Bidirectional |{{bus icon}} '''TheBus''': P37 |- !Adelphi Road / Fox Street |Bidirectional |{{bus icon}} '''TheBus''': P37 |- !Adelphi Road / Erie Street |Bidirectional |{{bus icon}} '''TheBus''': P37 |- !Adelphi Road / Edwards Way |Bidirectional |{{bus icon}} '''TheBus''': P37 |- !Edwards Way / Riggs Road |Bidirectional |{{bus icon}} '''Metrobus''': P16 |- !Riggs Road / Edwards Way<br />Adelphi |'''Northbound terminal (PM Peak)<br />Southbound station (AM Peak)''' |{{bus icon}} '''Metrobus''': P16 |- <!--| colspan="5" style="text-align:center;"|'''Notes''':--> |}<section end=p15-table/>
===P16 stops=== <section begin=p16-table/> {| class="wikitable collapsible collapsed" style="font-size: 95%;" |- !Bus stop !Direction !Connections |- !colspan="5"|Northeast Washington, D.C. |- !Fort Totten station<br /><small>Bus Bay D</small> |'''Northbound station,<br />Southbound terminal''' |{{bus icon}} '''Metrobus''': C71, C77, C81, D30, D44, M60, M6X, P15, P32, P35 <br />{{rint|rail|size=12}} '''Washington Metro''': {{WMATA icon|Red}} {{WMATA icon|Green}} {{WMATA icon|Yellow}} |- !Fort Totten station<br /><small>Bus Bay K</small> |Northbound |{{bus icon}} '''Metrobus''': C71, C77, C81, D30, D44, M60, M6X, P15, P32, P35<br />{{rint|rail|size=12}} '''Washington Metro''': {{WMATA icon|Red}} {{WMATA icon|Green}} {{WMATA icon|Yellow}} |- !First Place NE / Riggs Road NE |Northbound |{{bus icon}} '''Metrobus''': C71, C77, C81, D44, M60, P15 |- !First Place NE / Ingraham Street NE |Southbound |{{bus icon}} '''Metrobus''': C71, C77, C81, D44, M60, P15 |- !Riggs Road NE / South Dakota Avenue NE |Bidirectional |{{bus icon}} '''Metrobus''': C71, P15 |- !Riggs Road NE / Chillum Place NE |Bidirectional |{{bus icon}} '''Metrobus''': C71, M6X, P15 |- !Riggs Road NE / Nicholson Street NE |Bidirectional |{{bus icon}} '''Metrobus''': C71 (Northbound only), P15 |- !Riggs Road NE / 6th Street NE |Southbound |{{bus icon}} '''Metrobus''': P15 |- !colspan="5"|Prince George's County, Maryland |- !Riggs Road / Eastern Avenue |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Chillum Road |Bidirectional |{{bus icon}} '''Metrobus''': P15, P42 |- !Riggs Road / Sheridan Street |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Fairoak Avenue |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Ray Road |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Red Top Road |Southbound |{{bus icon}} '''Metrobus''': P15, P35 |- !Riggs Road / Sargent Road |Northbound |{{bus icon}} '''Metrobus''': P15, P35 |- !Riggs Road / Dayton Road |Bidirectional |{{bus icon}} '''Metrobus''': P15, P35 |- !Riggs Road / East-West Highway |Bidirectional |{{bus icon}} '''Metrobus''': M12, P15, P30, P35 |- !East-West Highway / 19th Place |Northbound |{{bus icon}} '''Metrobus''': M12, P15, P30, P35 |- !East-West Highway / Ager Road |Bidirectional |{{bus icon}} '''Metrobus''': M12, P15, P30, P35 |- !East-West Highway / 23rd Avenue |Southbound |{{bus icon}} '''Metrobus''': M12, P15, P30, P35 |- !23rd Avenue / Sheridan Street |Bidirectional |{{bus icon}} '''Metrobus''': M12, P15, P30, P35<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Woodberry Street |Northbound |{{bus icon}} '''Metrobus''': P15<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Amherst Street |Southbound |{{bus icon}} '''Metrobus''': P15<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Banning Place |Bidirectional |{{bus icon}} '''Metrobus''': P15<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Drexel Street |Bidirectional |{{bus icon}} '''Metrobus''': P15<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Fordham Street |Northbound |{{bus icon}} '''Metrobus''': P15<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Beechwood Street |Southbound |{{bus icon}} '''Metrobus''': P15<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Chapman Road |Northbound |{{bus icon}} '''Metrobus''': P15<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Hannon Street |Southbound |{{bus icon}} '''Metrobus''': P15<br />{{bus icon}} '''TheBus''': P43 |- !23rd Avenue / Lewisdale Drive |Northbound |{{bus icon}} '''Metrobus''': P15, P31<br />{{bus icon}} '''TheBus''': P43 |- !University Boulevard / 23rd Avenue |Southbound |{{bus icon}} '''Metrobus''': P15, P31<br />{{bus icon}} '''TheBus''': P43 |- !University Boulevard / Guilford Road |Northbound |{{bus icon}} '''Metrobus''': P15, P31<br />{{bus icon}} '''TheBus''': P43 |- !University Boulevard / Riggs Road |Bidirectional |{{bus icon}} '''Metrobus''': M12, P15, P31<br />{{bus icon}} '''TheBus''': P43<br />{{rint|rail|size=12}} MTA: Purple Line (at Riggs Road station) (Planned) |- !Riggs Road / Jasmine Terrace |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Keokee Street |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Lebanon Street |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Merrimac Drive |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Cool Spring Road |Northbound |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / 20th Avenue |Southbound |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Quebec Street |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Ruatan Street |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Saranac Street |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Apache Street |Bidirectional |{{bus icon}} '''Metrobus''': P15 |- !Riggs Road / Edwards Way |Bidirectional |{{bus icon}} '''Metrobus''': P15 (Southbound only) |- !Riggs Road / Adelphi Road |Bidirectional |{{bus icon}} '''TheBus''': P37 |- !Riggs Road / Hughes Road |Bidirectional | |- !Riggs Road / Buck Lodge Road |Bidirectional | |- !Riggs Road / Heatherwood Court |Bidirectional | |- !Riggs Road / Buck Lodge Terrace |Bidirectional | |- !Riggs Road / Cruze Place |Northbound | |- !Riggs Road / Lackawanna Street |Southbound | |- !Riggs Road / Mistletoe Place |Bidirectional | |- !Riggs Road / Towhee Avenue |Bidirectional | |- !Riggs Road / Mistletoe Place |Bidirectional | |- !Riggs Road / Wooded Way |Northbound | |- !Riggs Road / Forestdale Drive |Southbound | |- !Riggs Road / Glenmore Drive |Bidirectional | |- !Powder Mill Road / Floral Drive |Northbound | |- !Powder Mill Road / Pinewood Court |Bidirectional | |- !Powder Mill Road / #3210 |Bidirectional | |- !Powder Mill Road / Boxer Road |Northbound | |- !Powder Mill Road / Pleasant Acres Drive |Southbound | |- !Powder Mill Road / Cherry Mill Drive |Southbound | |- !Powder Mill Road / Cherry Hill Road |Bidirectional |{{bus icon}} '''Metrobus''': M42, M44 |- !Powder Mill Road / Cherry Hill Road |Northbound |{{bus icon}} '''Metrobus''': M44 |- !Powder Mill Road / High Point High School |Bidirectional |{{bus icon}} '''Metrobus''': M44 |- !Powder Mill Road / Evans Trail |Northbound |{{bus icon}} '''Metrobus''': M44 |- !Powder Mill Road / Allview Drive |Southbound |{{bus icon}} '''Metrobus''': M44 |- !Beltsville Drive / Giant Garden Center |Bidirectional | |- !Calverton Boulevard / Beltsville Drive |Bidirectional | |- !Calverton Boulevard / #3808 |Northbound | |- !Calverton Boulevard / Chapel View Drive |Bidirectional | |- !Calverton Boulevard / Fallston Avenue |Bidirectional | |- !colspan="5"|Montgomery County, Maryland |- !Calverton Boulevard / Galway Drive |Bidirectional |{{bus icon}} '''Metrobus''': M52 |- !Calverton Boulevard / Craiglawn Road |Bidirectional |{{bus icon}} '''Metrobus''': M52 |- !Calverton Boulevard / Gracefield Road |Bidirectional |{{bus icon}} '''Metrobus''': M52 |- !Cherry Hill Road / Plum Orchard Drive |Southbound |{{bus icon}} '''Metrobus''': M60 |- !Broadbirch Drive / Cherry Hill Road |Northbound |{{bus icon}} '''Metrobus''': M52, M60<br>Ride On: 27 |- !Plum Orchard Drive / Broadbirch Drive |Northbound |{{bus icon}} '''Metrobus''': M42, M44, M52, M60<br>Ride On: 27 |- !Plum Orchard Drive / ReStore |Southbound |{{bus icon}} '''Metrobus''': M42, M44, M60<br>Ride On: 27 |- !Plum Orchard Drive / Adventist White Oak Medical Center |'''Northbound terminal,<br />Southbound station''' |{{bus icon}} '''Metrobus''': M42, M44, M60<br>Ride On: 27 |- <!--| colspan="5" style="text-align:center;"|'''Notes''':--> |}<section end=p16-table/>
==History== {{multiple image | align = right | direction = vertical | width = 250 | image1 = WMATA New Flyer XDE40 7006.JPG | image2 = WMATA 2022 New Flyer XD40 4651.jpg | footer = Former Routes R1 and R2 at Fort Totten station. }} Before WMATA implemented the Better Bus Redesign network, Route P15 was previously known as Route R1, while Route P16 was previously known as Route R2. The Riggs Road Line was originally operated by routes R8 and R9 beginning in the 1970s running from Downtown DC to Calverton. Around the late 1970s, service to Downtown was discontinued and was replaced by the Red Line.<ref name="washingtonpost.com">{{cite web |last1=Pierre |first1=Robert |title=METRO SHUFFLING ITS BUS SCHEDULE |url=https://www.washingtonpost.com/archive/local/1993/12/09/metro-shuffling-its-bus-schedule/29c11358-4cae-44aa-91f7-d1b863257131/ |accessdate=23 February 2020}}</ref>
In 1975, the R2 was created as a new Metrobus Route to operate as part of the '''Calverton-Kennedy Center Line''' between the Kennedy Center and Great Oaks Center (Calverton), via F Street NW, New Hampshire Avenue NW, 19th Street NW (southbound), 18th Street NW (northbound), Connecticut Avenue NW, Columbia Road NW, Harvard Street NW (northbound), Mount Pleasant Street NW (northbound), Irving Street NW (eastbound), Park Place NW (southbound), Michigan Avenue NW/NE, Queens Chapel Road, Belcrest Road, the Prince George's Plaza Shopping Center, Toledo Road, Adelphi Road, Campus Drive, Baltimore Avenue, Rhode Island Avenue, Powder Mill Road, and Cherry Hill Road. On February 6, 1978, the R2 was rerouted to serve as part of the Queens Chapel Road Line running with routes R4, R6, and R7. Route R2 operated between the newly opened Brookland–CUA station and Centerpark Office Park in Calverton, via Queens Chapel Road, Belcrest Road, Prince George's Plaza, Baltimore Avenue, Rhode Island Avenue, and Powder Mill Road.<ref name="washingtonpost.com"/>
In 1975 the R4 was created as a new Metrobus Route to operate as part of the '''Crystal City-Calverton Line''' between Crystal City in Virginia and Great Oaks Center (Calverton), via the 14th Street bridges, Independence Avenue, 1st Street NE, Columbus Circle, Washington Union Station, Massachusetts Avenue NE, North Capitol Street NW, Riggs Road, Powder Mill Road, Beltsville Drive, Calverton Boulevard, and Cherry Hill Road.<ref name=":0">{{Cite news |date=2023-12-20 |title=Major Bus Route Changes Set Tuesday |url=https://www.washingtonpost.com/archive/local/1978/02/19/major-bus-route-changes-set-tuesday/08c241f2-d299-42e1-92df-ea1250dada79/ |access-date=2024-04-16 |work=Washington Post |language=en-US |issn=0190-8286}}</ref>
Around the same time, route R8 along with the R4 would operate between Calverton and Crystal City station but would later be shortened to Fort Totten station. Route R5 would also operate between Fort McNair and Kennedy Center but would be later replaced.
On February 19, 1978,<ref name=":0" /> shortly after both Fort Totten station and Brookland–CUA stations opened, the R4 was rerouted to operate as part of the Queens Chapel Road Line between Brookland-CUA and Hyattsville. Once this change took place, the R8 replaced R4's routing on the Riggs Road Corridor, by operating between the Fort Totten station and Great Oaks Center (Calverton). In later years, the R9 would join the R8.
On December 11, 1993,<ref name="washingtonpost.com"/> Routes R8 and R9 were discontinued and replaced by the R2, originally a part of the Queens Chapel Road Line, which was rerouted to operate between Fort Totten station and Great Oaks Center (Calverton), via Prince George's Plaza station and Prince George's Plaza, and Riggs Road. Service to Brookland–CUA was replaced by the R4.
Also, new Routes R1 and R5 would join the R2. Route R1 would only operate between Fort Totten and Adelphi during the weekday peak hours, skipping the R2's diversion into Lewisdale and Prince George's Plaza and remaining on Riggs Road. The route would make a loop through Adelphi via Metzerott Road, New Hampshire Avenue, Adelphi Road, and Edwards Way, to reach its terminus at Edwards Way & Riggs Road (Adelphi). Route R5 would also operate during the weekday peak hours and would follow the R2's routing except the route would skip Prince George's Plaza.<ref name="washingtonpost.com" />
Later around the 1990s, Route R7, which operated as part of the Queens Chapel Road Line alongside Routes R2, R4, and R6, was restored to operate as part of the Riggs Road Line between the Fort Totten station and Great Oaks Center (Calverton), via R2 and R5's routing but except it would divert into the United States Army Research Laboratory along Floral Drive.<ref name="washingtonpost.com" /><ref name="RiggsRoad">{{cite web |title=Technical Memorandum #1: Transit Service Assessment |url=https://www.wmata.com/service/bus/upload/Riggs-Road-Line-Transit-Service-Assessment.pdf |accessdate=23 February 2020}}</ref> The R7 would also skip the R2's diversion to Prince George's Plaza.
In June 1996 when the Great Oaks Center closed,<ref>{{Cite news |date=2024-01-07 |title=The Great Exodus at Md.'s Great Oaks |url=https://www.washingtonpost.com/archive/local/1996/05/04/the-great-exodus-at-mds-great-oaks/2f75e955-d030-4d16-b0c0-cd86a79ebbd1/ |access-date=2024-04-16 |work=Washington Post |language=en-US |issn=0190-8286}}</ref><ref>{{Cite web |title=Maryland State Archives - Guide to Government Records |url=https://guide.msa.maryland.gov/pages/history.aspx?ID=SH244#:~:text=The%20closure%20of%20the%20Great,and%20certification%20for%20federal%20Medicaid |access-date=2024-04-16 |website=guide.msa.maryland.gov}}</ref> the R2, R5, and R7 Metrobus Routes were rerouted to terminate at the Orchard Shopping Center.
In 1998, route R7 was eliminated due to security concerns at the United States Army Research Laboratory. Service was replaced by route R2.<ref name="RiggsRoad"/>
On May 15, 2003, the original bus bays inside Prince Georges Plaza Shopping Center, were demolished to build a new Target store. Route R2 along with routes 86, C4, F4, F6, F8, R3, R4 and TheBus 13, 14, 18 have stopped entering and looping inside around the mall.<ref>{{cite web|url=http://www.gazette.net/gazette_archive/2003/200320/hyattsville/news/158762-1.html|title=Metrobus service suspended at Prince Georges Plaza|website=www.gazette.net|access-date=February 23, 2020 |archive-url=https://web.archive.org/web/20190329001034/http://www.gazette.net/gazette_archive/2003/200320/hyattsville/news/158762-1.html |archive-date=March 29, 2019 |url-status=dead}}</ref> This change did not affect routes R1 or R5.
In 2010, a series of proposals were created for Routes R2 and R5 as part of WMATA's FY2011 and FY2012 budget.<ref name="Fiscal2011">{{cite web|url=https://www.wmata.com/about/public-hearings/upload/bus_md.pdf|format=PDF|title=MARYLAND PROPOSED BUS SERVICE CHANGES : FISCAL YEAR 2011|website=Wmata.com\accessdate=23 February 2020}}</ref> In the proposal, WMATA was to reroute route R2 into Lewisdale neighborhood along 23rd avenue and University Boulevard replacing route R3, which is proposed to be eliminated. Route R2 would also discontinue service to Prince George's Plaza station with alternative service provided by routes C4, F4, and TheBus 18. Route R5 would be discontinued and replaced by a more frequent R2 service. Route R1 would not be affected by the changes.<ref name="Fiscal2011"/>
The proposal would be brought up again in 2011 sharing the same proposal idea from the 2010 proposed changes.<ref>{{cite web |title=B11-03: Proposed Adjustments to Metrobus Service; October 11-13, 2011 |url=https://www.wmata.com/about/public-hearings/B11-03-Proposed-Adjustments-to-Metrobus-Service-October-11.cfm |accessdate=19 May 2020}}</ref><ref>{{cite web |title=Notice of Public Hearing Washington Metropolitan Area Transit Authority Proposed Adjustments to Metrobus Service Docket B11-03 |url=https://www.wmata.com/about/public-hearings/upload/B11-03_docket_final.pdf |accessdate=19 May 2020}}</ref>
On June 17, 2012, Route R2 was changed to operate along 23rd Avenue, and University Boulevard before resuming its regular route along Riggs Road to serve the Lewisdale neighborhood, which replaced the R3 which was shortened to terminate at Prince George's Plaza. Service to Prince George's Plaza was discontinued and replaced by TheBus Route 18. Route R5 was also discontinued and replaced by additional R1 and R2 service.<ref name="NewsRelease">{{cite web|url=https://www.wmata.com/about/news/pressreleasedetail.cfm?ReleaseID=5233|title=Metro News Release|website=wmata.com|accessdate=12 May 2020|archive-url=https://web.archive.org/web/20181214065918/https://www.wmata.com/about/news/pressreleasedetail.cfm?ReleaseID=5233|archive-date=December 14, 2018|url-status=dead}}</ref>
On December 30, 2018, WMATA announced a proposal to make changes to the R2 routing.<ref>{{cite web|url=https://www.wmata.com/service/bus/riggs-road-study.cfm|title=Riggs Road Service Evaluation Study - WMATA|website=www.wmata.com}}</ref>
One proposal was to extend the R2 beyond Calverton to Muirkirk station on the MARC Camden Line or to Greenbelt station discontinuing the Calverton loop.<ref>{{cite web|url=https://www.wmata.com/service/bus/upload/Riggs-Road-Proposal-1-R2-Extension-map.pdf|title=Riggs-Road-Proposal-1-R2-Extension-map.pdf|author=|date=|website=wmata.com|access-date=January 27, 2019}}</ref>
The second proposal was to eliminate the segment of Route R2 service 23rd Avenue in Lewisdale and discontinue the R1 completely to create a more direct route for the R2 and to simplify the line.<ref>{{cite web|url=https://www.wmata.com/service/bus/upload/Riggs-Road-Proposal-2-Adelphi-loop-alternatives-map.pdf|title=Riggs-Road-Proposal-2-Adelphi-loop-alternatives-map.pdf|author=|date=|website=wmata.com|access-date=January 27, 2019}}</ref><ref>{{cite web|url=https://www.wmata.com/service/bus/upload/Riggs-Road-Proposal-2-New-Riggs-Road-Line-R2-map.pdf|title=Riggs-Road-Proposal-2-New-Riggs-Road-Line-R2-map.pdf|author=|date=|website=wmata.com|access-date=January 27, 2019}}</ref> The discontinued segments in Lewisdale would be replaced by a rerouted route F8 and the already running TheBus route 18. Route F8 was proposed to make all stops on the proposed discontinued route R2 service in Lewisdale and discontinue service along Adelphi road.<ref>{{cite web|url=https://www.wmata.com/service/bus/upload/Riggs-Road-Proposal-2-A-Adelphi-Road-F8-reroute-map.pdf|title=Riggs-Road-Proposal-2-A-Adelphi-Road-F8-reroute-map.pdf|author=|date=|website=wmata.com|access-date=January 27, 2019}}</ref> If the proposals are made, the R2 would provide a more direct route to Calverton or Fort Totten for customer convenience with the R1 being discontinued due to it being a duplication of the R2.
Other proposals mentioned that weren't considered were the following:<ref name="Recommendations">{{cite web |title=Technical Memorandum #3: Service Plan Recommendations |url=https://www.wmata.com/service/bus/upload/Riggs-Road-Line-Service-Plan-Recommendations.pdf |accessdate=23 February 2020}}</ref> * Creating a new MetroExtra route for the Riggs Road Line. * Moving either route R1 or R2 terminal to Prince George's Plaza (now {{wmata|Hyattsville Crossing}}) station with the other route remaining at Fort Totten station. * Rerouting route R1 to Takoma Langley Crossroads Transit Center discontinuing service to Adelphi. * Giving route R1 daily service but having route R2 be rerouted to Prince George's Plaza (now {{wmata|Hyattsville Crossing}}) station from Calverton. * Swap route R1 and R2 routing in Lewisdale with R2 remaining on Riggs Road while R1 is rerouted along 23rd Avenue and University Boulevard.
None of the proposals went through due to public feedback.<ref>{{cite web |title=Technical Memorandum #2: Public Outreach and Input Report |url=https://www.wmata.com/service/bus/upload/Riggs-Road-Line-Public-Outreach-Input-Report.pdf |accessdate=23 February 2020}}</ref><ref name="Recommendations"/>
During the COVID-19 pandemic, all route R1 service was suspended and route R2 was reduced to operate on its Saturday schedule beginning on March 16, 2020.<ref>{{cite web |title=Metro announces additional COVID-19 changes, including reduced service beginning Monday {{!}} WMATA |url=https://www.wmata.com/about/news/Metro-announces-additional-COVID-19-changes.cfm |website=www.wmata.com |access-date=31 January 2021}}</ref> However on March 18, 2020, route R2 was further reduced to operate on its Sunday schedule with weekend service suspended beginning on March 21, 2020.<ref>{{cite web |title=Metro Service Levels & Hours Further Reduced to Support Essential Trips Only, Starting Wednesday {{!}} WMATA |url=https://www.wmata.com/about/news/METRO-SERVICE-FURTHER-REDUCED-TO-SUPPORT-ESSENTIAL-TRIPS-ONLY.cfm |website=www.wmata.com |access-date=31 January 2021}}</ref><ref>{{cite web |title=Weekend: Metro service limited to 26 bus routes, reduced rail service; expect wait times of 30 minutes; customers urged to travel only if essential {{!}} WMATA |url=https://www.wmata.com/about/news/Weekend-service-3-28-3-29.cfm |website=www.wmata.com |access-date=11 February 2021}}</ref> Route R1 was brought back to service on August 23, 2020 while route R2 resumed its regular schedule on the same day.<ref>{{cite web |title=Metrobus Service Changes beginning August 23 {{!}} WMATA |url=https://www.wmata.com/service/status/details/proposed-august-2020-metrobus-service-changes.cfm |website=www.wmata.com |access-date=31 January 2021}}</ref>
===Better Bus Redesign=== In 2022, WMATA launched its Better Bus Redesign project, which aimed to redesign the entire Metrobus Network and is the first full redesign of the agency's bus network in its history.
In April 2023, WMATA launched its Draft Visionary Network. As part of the drafts, the Riggs Road Line was simplified into just the R2 and named Route MD244. The Calverton loop was replaced with a bidirectional routing along Calverton Boulevard. Service on Metzerott Road was also replaced by the proposed Route MD246.<ref>{{cite web |title=Draft Visionary Maryland Routes |url=https://www.wmata.com/initiatives/plans/Better-Bus/upload/DraftVisionaryRouteProfiles041723-EN_MD.pdf |access-date=29 July 2025}}</ref>
During WMATA's Revised Draft Visionary Network, WMATA renamed the MD244 into the P13 and changed to have both the R1 and R2 operate as a single route between Fort Totten and White Oak Medical Center via Adelphi. The route would follow the current R2 routing with the Calverton loop turning bidirectional along Calverton Boulevard, but would also loop around Adelphi via Metzerott Road, New Hampshire Avenue, and Adelphi Road on some trips. Every other weekday rush hour and Saturday trip before 8:00 pm would only operate between Fort Totten and the Adelphi Loop. Service operating to White Oak would skip the Adelphi Loop and remain on Riggs Road. The MD246 was also renamed to the P36 and kept its same routing.<ref>{{cite web |title=Revised Visionary Network Route Summary |url=https://www.wmata.com/initiatives/plans/Better-Bus/upload/BBNR_Phase-2-Comment-Response-Summary-2.pdf |access-date=29 July 2025}}</ref> All changes were then proposed during WMATA's 2025 Proposed Network.<ref>{{cite web |title=Proposed 2025 Network Maryland Routes |url=https://www.wmata.com/initiatives/plans/Better-Bus/upload/EN-MD-Route-Profiles-05-07-24.pdf |access-date=29 July 2025}}</ref><ref>{{cite web |title=Revised Visionary Network Route Summary |url=https://www.wmata.com/initiatives/plans/Better-Bus/upload/EN-Visionary-Route-Frequency-Table-05-10-24.pdf}}</ref>
During the proposed 2025 Network changes, the P13 and P36 were dropped from the proposal and instead replaced by Routes P15 and P16. The P15 operates a similar routing to the R1, but was rerouted to follow the R2 and operate inside the Lewisdale Neighborhood via East-West Highway, 23rd Avenue, and University Boulevard before resuming its service to the Adelphi Loop. The P16 followed the R2 almost entirely, with the Calverton loop turning bidirectional along Calverton Boulevard, similar to the former P13 proposal.<ref>{{cite web |title=Maryland Better Bus Routes |url=https://www.wmata.com/initiatives/plans/Better-Bus/upload/Resource_2025-Route-Profiles_Maryland.pdf }}{{Dead link|date=January 2026 |bot=InternetArchiveBot }}</ref>
On November 21, 2024, WMATA approved its Better Bus Redesign Network, with service on the Riggs Road Line being simplified.<ref>{{cite web |title=Metro Board of Directors approves Better Bus Network Redesign, new bus routes to start next summer |url=https://www.wmata.com/about/news/Metro-Board-of-Directors-approves-Better-Bus-Network-Redesign-new-bus-routes-to-start-next-summer.cfm |website=WMATA |access-date=23 January 2025 |language=en}}</ref>
Beginning on June 29, 2025, Route R1 was renamed to Route P15 and rerouted to serve the Lewisdale neighborhood, with the rest of the routing remaining the same. Route R2 was renamed to Route P16 and was rerouted to not serve Cherry Hill Road, and instead have bidirectional service along Calverton Boulevard.<ref>{{cite web |title=Maryland Route Profiles |url=https://www.wmata.com/initiatives/plans/Better-Bus/upload/MD_Routes_042525.pdf |access-date=29 July 2025}}</ref>
==References== {{Reflist}}
P16