turn signal

US /ˈtɝːn ˌsɪɡ.nəl/
UK /ˈtɝːn ˌsɪɡ.nəl/
"turn signal" picture
1.

señal de giro, intermitente

a flashing light on a vehicle that indicates the driver's intention to turn left or right, or to change lanes

:
Don't forget to use your turn signal when changing lanes.
No olvides usar la señal de giro al cambiar de carril.
The driver failed to activate his turn signal before making the turn.
El conductor no activó su señal de giro antes de girar.