Why do fire trucks with full lights and sirens go through a red light at intersections and then, after they go through, they turn off their lights and slow down?
Most likely, when you see an emergency vehicle with red lights and sirens go through an intersection and then slow down and turn the emergency lights off, they have been cancelled from the call to which they were responding by radios in the fire engine.

Often several units are dispatched to the same incident. The 1st unit may have arrived on the scene, assessed the situation and informed the dispatcher that a single engine could handle the emergency. All other responding units are then cancelled by radio and are available and ready to take another call.

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1. What do firefighters do while they are waiting for a fire or other emergency?
2. What schedule do firefighters work?
3. Why do fire engines and ambulances respond on emergency medical calls?
4. Why do fire trucks with full lights and sirens go through a red light at intersections and then, after they go through, they turn off their lights and slow down?
5. Why do firefighters use chain saws to cut holes in the roof of a building that’s on fire?
6. Does the Fire Department service fire extinguishers?
7. When an emergency vehicle is approaching that is displaying emergency lights and sirens, what should I do?
8. Why did I see another Fire Department’s fire engine in Gilroy?
9. Why do so many fire trucks respond to simple incidents?
10. Why do fire trucks respond to motor vehicle accidents?