a light that flashes to convey a message or warning, such as a signal to people in a studio
A warning signal, as at a highway or railway intersection, consisting of a light or lights, usually red or yellow, operating in an alternating sequence of off and on.
A warning signal at an intersection or railway crossing which the contestant is obliged to obey. The blinker consists of a light or lights, usually red or yellow, operating in a fixed sequence of on and off. For rally purposes, only one blinker may exist at an intersection or railway crossing. The blinker may or may not be operating.
A signal light consisting of red or yellow lights designed to regularly sequence on and off, whether operating or not, and legally applicable to rally traffic. Only one blinker applies at the same railroad crossing, intersection, or other cautionary/stopping point on the rally road.