At any point at which a special traffic signal has been erected to control the movement of vehicles turning left across a streetcar track, no streetcar shall proceed straight ahead or turn to the right during the time when the traffic signal shows a left-turn indication.
At any point where a special traffic signal has been erected to control the movement of vehicles turning right, no streetcar shall turn to the right while the traffic signal shows an indication for a straight through movement or a full green indication.
D.C. Mun. Regs. tit. 18, r. 18-2105