stop light
US /ˈstɑːp laɪt/
UK /ˈstɑːp laɪt/

1.
semaforo
a set of automatically operated colored lights, typically red, yellow, and green, for controlling traffic at road junctions and pedestrian crossings
:
•
The car stopped at the stop light.
L'auto si è fermata al semaforo.
•
Wait for the stop light to turn green before crossing.
Aspetta che il semaforo diventi verde prima di attraversare.