Answer: stoplights

AnswerCrossword Clue
STOPLIGHTSTraffic control devices
STOPLIGHTSRed signals
STOPLIGHTSThey turn at busy intersections
STOPLIGHTSControllers of traffic flow
STOPLIGHTSMotor vehicle features
stoplightsSTOPLIGHT, the brake light on a car