Routes P17 and P19 operated during the weekday peak-hours between Fort Washington Park & Ride Lot and Farragut Square via Oxon Hill Road, Indian Head Highway, and South Capitol Street.

Route P18 operated between Fort Washington Park & Ride Lot and Bolling Air Force Base.

Route P17 and P19 operates a limited stop segment between the Oxon Hill Park & Ride and Washington DC and had several boarding and alighting restrictions to passengers.

[2] On December 28, 1991, route P18 was diverted along Firth Sterling Avenue to serve Anacostia station when it opened.

[5] Also WMATA proposed to eliminate existing boarding and alighting restrictions and instead create a limited stop segment between the Oxon Hill Park & Ride and South Capitol & O Streets for routes P17 and P19 because the existing boarding and alighting restrictions are confusing for passengers and operators and creating a limited stop segment would preserve the “express” nature of the route in a more easy to understand way.

Routes P17 and P19 also discontinue the boarding and alighting restrictions and instead had a limited stop segment created between the Oxon Hill Park & Ride and South Capitol & O Streets.

WMATA would also charge the local fare for routes P17 and P19 as express service would be discontinued if it was rerouted to Southern Avenue.