What is the difference between yellow and red traffic lights?
What is the difference between yellow and red traffic lights? Yellow lights are displayed to the main road, to highlight the intersection and inform drivers of the need for caution. Red lights supplement stop signs on the side road approaches. All-way red flashing lights can supplement all-way stop control, but all-way yellow signals are prohibited by US regulations.
What do the different color traffic lights mean?
Red: Stop. Yellow: Prepare to stop. Green: Go. Flashing red light: Come to a complete stop and yield to oncoming traffic or pedestrians.