One thing I realized is unrealistic
After the police station massacre, there's no more police to be seen throughout the rest of the movie.
In real life probably all the neighboring police departments would get involved to help, the military would be sent in, the roads would be controlled, the whole place would be on lockdown until they find this guy etc.
And before you tell me there wasn't enough time for a reaction of law enforcement, remember that they spend the whole night under the bridge and then the next day casually check in in the motel, and nothing seems to be out of the ordinary, and the roads are free for a later car chase.
It's like that police station was the only law enforcement unit in the whole world.