The D.C. Metro Service Bureau was a local municipal agency which managed the City Liner public transportation system. This system consisted of a fleet of buses which transported passengers along a route and deposited and picked up passengers from bus stops. Some of these bus stops were placed close to the Metro, which was managed by the D.C. Transit Authority.
The name of this agency is seen on the sides of the City Liner buses, above the doors in Fallout 3.