4) Public Transit
Imagine how chaotic it would be if you were driving on the highway and someone inside your car suddenly turned into a zombie.
You’d probably start swerving as you desperately tried to avoid having this rabid ghoul bite you or your other passengers, being more focused on what’s going on inside the car instead of outside. Well, now imagine that in a much bigger vehicle, with a proportionate number of people, and you have some idea of the chaos you’d see if you were on a bus when someone turned. It would be pandemonium, as people would be spilling all over the bus, scrambling to flee, while the driver tried not to crash as they heard all this madness going on behind them, and, likely, did not succeed.
Trains would be better in the sense that they would be far less likely to crash, but, being trains, would be worse in that they take all that’s potentially bad about elevators and magnify it tenfold. Calling being on a train in a zombie apocalypse pandemonium and chaos wouldn’t do that justice: It would be Hell on Earth, pure and simple.
How to avoid it?
This one is, actually, pretty damn simple: The moment you start hearing stories going around town about something that could be described as zombie, just don’t take public transit. I mean, you should probably be trying to get out of town immediately, but, if you can reduce the potential for being trapped in a confined space with an indeterminate amount of zombies while trying to do so, that’s good for a start.