Those driving cop cars care little for hitchhikers, street signs, traffic cones, construction workers, tommy gun wielding mobsters, land mines, and even their own pedestrian brethren. The only thing they know and respect is the sanctity of the pit stop.
I'm surprised to say I much prefer the iOS version. They added to it, window-dressing wise, and the gameplay feels smoother. Also, I like bashing my tablet and hearing a nice *SWOCK*.