The purpose of emergency warning equipment is to let drivers and pedestrians know that an emergency vehicle is on the way to an emergency. By Virginia state law, we do have certain privileges extended to us. Those being, to carefully proceed through controlled intersections and travel against the designated flow of traffic. These privileges have rules that the legislation and department policy put on the drivers of these emergency vehicles. The main rule is that we cannot do these things unless there are lights flashing and sirens going. Even in the middle of the night.