if you hit and kill a bunch of them in a secluded area probably nothing might even happen apart from some damage to your car. If they are criminals they cannot risk going to the cops, and besides, there wont be any witnesses at such a place at 2AM, which is the reason they chose that spot to ambush you in the first place.
If anyone tries to ambush you, floor the gas, run them over, mow them down, extra points if you kill a few of them. Show no mercy.
Also consider carrying weapons. A sword or machete will work. Yes, they may be illegal but who cares, if the police try to arrest you for that, bribe them with a good sum of money.