Don't get me wrong -- I know high speed chases are exciting, and I do enjoy them. However, every once in a while I want to play realistically and the pursuits are always immersion-breaking; car chases IRL do not actually reach 100mph all the time, after all. Plus, slower pursuits may be preferable given the limitations of the game:
It's really easy to crash your vehicle when speed is too high, especially when using a more realistic handling.
It's hard to do PIT maneuvers reliably at high speeds.
The AI police car drives even worse and constantly crash into other cars creating chaos. They also miss turns, crash into each other at a stop, and drive into ditches.
Of course not everyone's definition of "realistic speed" is the same and it may also depend on play style and handlings used, etc. So I think it's a good idea to add a slider which scales the pursuit speed down, which the users can adjust (or disable).
I am a big fan of the pursuit style and "tracking mode" addition to the last LSPDFR update, and this will be a great complement. What do y'all think?