2205.1 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.

2205.2 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.

2205.3 [Deleted] D.C. Law 1-110, 23 DCR 4954 (January 21, 1977)

2205.4 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:

1. (a) LEFT TURN: Hand and arm extended horizontally;
2. (b) RIGHT TURN: Hand and arm extended upward; and
3. (c) STOP OR DECREASE SPEED: Hand and arm extended downward.

SOURCE: Commissioners' Order 274, 310/949 effective September 1, 1949, 17 DCRR § 40, 41 (October 19, 1970); as amended by § 8(b) of the District of Columbia Motorized Bicycle Act, D.C. Law 1-110, 23 DCR 4954 (January 21, 1977).