Route 20 provides service from the Addison Road Metrorail Station to Upper Marlboro, where riders
can access the County Courthouse. The route also serves businesses along the Marlboro Pike
corridor as well as the Melwood Training Center. Route 20 also provides service access to PennMar Shopping Center in Forestville and Marlboro Village Shopping Center in Upper Marlboro.
Effective December 4, 2023, Route 20 no longer stops at the rear of the County Administration
Building; trips begin and end at the Courthouse. Additionally, Route 20 does not serve
Meadows/Melwood Training Center on Saturdays and on weekday trips that depart before 7:30
a.m. or after 5:00 p.m., with one exception: the 6:00 a.m. trip departing Addison Road.