When a police car turns red, they are about to ram you. Try to lose them or ram them first. Parked police cars will cause damage with the Stinger road spikes. However, it can always be avoided and will also damage police cars that are pushed over it. When you stop your car, the police cars will also stop. If you drive slower, it will be easier for you to control your car and avoid getting random damage from oversteering or jumping into the sea is minimized.