Do hazard lights turn on automatically in an accident?
Do hazard lights turn on automatically in an accident? Answered by CarsGuide. Plenty of cars now feature hazard lights that turn on automatically when the driver applies the brakes hard. It's designed simply to warn drivers behind that something is happening ahead of them and they should use caution (and slow down). Do hazard lights mean thank you? Once the driver successfully changed lanes, the car's hazard lights will be flashed a few times as a way of saying thank you to the other driver who yielded or gave way. What's the step change in safety major accident hazard understanding?...