DDOT may designate any traffic lane on any roadway for the exclusive use of a single class of vehicle, or combination of classes of vehicles, such as buses, during certain hours. (DCMR 18-2220.1).
Bus lanes are a form of transit facility that can improve the speed, frequency, and efficiency of multiple bus and bus transit services. Typically, bus lanes should be implemented in corridors where a high volume of bus service already exists, particularly in downtown areas.