Do what you want in the game, ram the police at full speed, drive through a red light, speed up, the penalty for this will always be zero.
American Truck Simulator: Cheat (PayZero) Free Download
The difference between this Cheat and a cheat that turns off the police, this cheat does not remove police patrol cars, which preserves realism, but saves you financial losses. Installing Cheat is simple, you need to drop the PayZero.scs file into the mods folder and activate this Cheat through the profile.