Temporary Detour: 2026 Greenbelt Labor Day Parade

Updated: 9/1/2026

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Advisory Effective: Sep 7, 2026 – Sep 7, 2026

Routes Affected: P20, P21

On Monday, September 7, from 6:00am until 4:00pm, buses will detour due to the 2026 Greenbelt Labor Day Parade. Please allow additional travel time and avoid the area if possible.

Street Closure:

Crescent Rd between Greenhill Rd and Southway

The following route will detour:

P20 Greenbelt Rd-New Carrollton northbound towards Greenbelt

Buses begin detouring on Southway at Ridge Rd, resuming regular route on Ridge Rd at 12^th Ct.

P20 Greenbelt Rd-New Carrollton southbound towards New Carrollton

Buses begin detouring on Ridge Rd at Southway, resuming regular route on Southway at Ridge Rd.

P21 Hanover Pkwy-New Carrollton northbound towards Greenbelt

Buses begin detouring on Ridget Rd at Southway, resuming regular route on Ridge Rd at Hamilton Pl.

P21 Hanover Pkwy-New Carrollton southbound towards New Carrollton

Buses begin detouring on Ridge Rd at Gardenway, resuming regular route on Ridge Rd at 12^th Ct.