ANOTHER IDEA

Response times are generally down to the number of other calls around not the actual speed the vehicle drives

Response times are based on the severity of the call!
Speed is a factor,
GENERALLY,
Code 1 - No lights, No Sirens, Normal Traffic
Code 2 - No Siren, Use lights, use siren to get through heavy traffic if it decreases response time
Code 3- Use Lights All The Way To Scene, Use sirens All The Way To Scene, High Priority Call, Get There Fast

We already have a slow response for events and fast, lighted response for other missions, don't really see the need for anything more unless you want to be sorting out missions slower by getting there later

Sorry, should have made that more clear. my last post was more about real life than in game. "Response times are generally down to the number of other calls around not the actual speed the vehicle drives" not sure if this is for in game but if it is, response times are the same for me no matter the number of calls.

AND THE HELICOPTER GOES THE SAME SPEED AS THE GROUND UNITS. FIX THAT TOO!!

The three helis that I use definitely don't run at the same speed as my ground units

Do yours go twice as fast as the ground units? I will admit they are slightly faster but not much and direct line-of-site is nice but they should be scaled for the 120 that they do (rounded off)

I haven't done any maths behind it, but my instinct, which is generally ok, tells me it's going around 1.5-2X the speed of ground units. That's not too far off what I believe is sort of realistic. It's not exactly crawling over the terrain.