traffic light

US /ˈtræf.ɪk ˌlaɪt/
UK /ˈtræf.ɪk ˌlaɪt/
"traffic light" picture
1.

semaforo

a set of automatically operated colored lights, typically red, yellow, and green, for controlling the flow of traffic at road junctions or pedestrian crossings

:
The car stopped at the traffic light.
L'auto si è fermata al semaforo.
Turn left at the next traffic light.
Gira a sinistra al prossimo semaforo.