Required stop or turn signals shall be given by using the hand and arm, by a signal lamp or lamps, or by means of a mechanical signal device, except as otherwise provided in this section.
Any motor vehicle in use on a highway shall be equipped with signal lamp(s) or mechanical signal device when required by chapter 6 of this title. If a any motor vehicle is required to be equipped with a signal lamp(s) or mechanical signal devices, the required signal shall be given by means of lamps or devices.
[Deleted] D.C. Law 1-110, 23 DCR 4954 (January 21, 1977)
All signals required by this chapter to be given by hand-and-arm shall be given from the left side of the vehicle in the following manner and the signals shall indicate as follows:
D.C. Mun. Regs. tit. 18, r. 18-2205