noun British. a directional signal on a vehicle for indicating which way it is going to turn.

What does trafficator mean?

: a movable directional signal on a vehicle.

What is the use of trafficator?

Trafficators are devices once used on motor vehicles to indicate that a vehicle was intending to turn. ... The trafficators indicated whether a car was turning right or left at an intersection, providing a clear visual signal and allowing people to keep their hands free for driving.