But what if your rearview mirror reveals green lights on a car behind you? They’re not as common as your typical emergency vehicle lights, but you could definitely see them on the road—and it ...

A version of the video in Spanish is available here. California law 21806 CVC requires motorists to pull to the right and stop when an emergency vehicle approaches with lights and sirens activated.

In addition to the emergency vehicles, eight traffic lights were equipped with special communication technology so that the vehicles "report" to these traffic lights when they are approaching. These ...