When people hear the "Q"they know a fire truck is coming. I have noticed when driving, that people get out of the way sooner when they hear the "Q" versus the siren.
the "Q" will move traffic it's the sound of the fire truck coming the Q and the air horn will move more traffic than those electronis sirens any day I could not imaging a truck without THE Q on the bumper it's as american as baseball,apple pie and mom
A real fire engine is not a fire engine without a Federal Q! NO Peanut Whistles! With a peanut whistle you dont know whats coming down the road whether it is an ambulance or a police car!