Don't lock yourself in unmoving vehicles. Locomotion is your advantage - use it. They then leap out, all mouth and fingers, like a puberty stricken horndog going for second base. If Bill Gates turned into a zombie, he'd be one of these guys. It helps if you've ever been a 16 year old girl out on her fourth date.
Zombies have limited offensive capability.
Mainly they bite, like a lil' sissy boy. That's a close range weapon with a range of about three inches square. Don't let them get that close. Refuse slow dances. Don't be taken in by the old 'gee your hair smells terrific' routine.