Emergency vehicles are involved in accidents nearly every day. This includes police, fire, or ambulances responding to emergency calls. It could also involve police vehicles involved in a chase. Emergency vehicles sometimes have accidents with innocent victims while in route to a call. The vehicles that they have an accident with might not have been doing anything wrong at the time of the accident. They were simply in the wrong place at the wrong time. Traffic Signals Emergency vehicles are generally not exempt from obeying them. They are expected to.