At the very least, a simple Bicycle that is about 2-3x as fast as normal running speed would be a nice addition. I can do without cars as long as a Bicycle is in the game. You could even have one with a basket or two on it to carry extra loot. Also, Bicycles are quiet and wouldn't exactly attract Z's
And what about Horses? A horse mount to ride around would be nice too. Have horses been discussed? I smell another trait here with horse riding