Passengers would have to transfer to either another Metrobus route or the Red Line to travel the rest of the way to Downtown Washington D.C. or West Potomac Park from Rhode Island Avenue–Brentwood station.

On November 21, 1978, when New Carrollton station opened, routes 84 & 85 were extended from their terminus at Eastpine Shopping Center, to New Carrollton station via Riverdale Road, Auburn Avenue, Good Luck Road, Lamont Drive, Carrollton Parkway, 85th Place, Powhatan Street, Westbrook Drive, 85th Avenue, West Lanham Drive, and Ellin Road.

The limited stop segment was to reduce bus bunching along Rhode Island Avenue and improve on time performance for routes T14 and T18.

[5] Buses would only serve the following stops: Passengers wishing for local service will have to use routes 83 or 86.

[5] During the COVID-19 pandemic, the route was relegated to operate on its Saturday supplemental schedule beginning on March 16, 2020.

[9] On September 26, 2020, WMATA proposed to eliminate all route T14 Sunday service due to low federal funding in response to the COVID-19 pandemic.

[11] As part of WMATA's Better Bus Redesign Network approval, Route T14 was modified to serve Takoma station via Chillum Road and Fort Lincoln, then follow the current routing between Bladensburg Road and New Carrollton.