25.1.8.240 Signal Lamp and Signal Devices

(a) Any motor vehicle, trailer, semi-trailer and house trailer may be equipped and when required under this Act shall be equipped with the following signal lamps and devices:

(1) A stop lamp or stop lamps on the rear which shall emit a red, amber or yellow light and which shall be actuated upon application of the service brakes and which may but need not be incorporated with one or more other rear lamps.

(2) A lamp or lamps or mechanical signal device capable of clearly indicating any intention to turn either to the right or to the left and which shall be visible both from the front and the rear.

(b) Every stop lamp shall be plainly visible and understandable from a distance of 100 feet both to the front and rear. When a vehicle is equipped with a stop lamp or other signal lamps, such laps or lamps shall at all times be maintained in good working condition. No stop lamp or signal lamp shall project a glaring or dazzling light.