I was thinking, when they implement vehicles, you will be able to find them in the highway, or streets, but they will need energy or fuel/oil. I thought that they can let us scavenge the cars, buses, etc that are abandoned and you could find bags, medicine, like painkillers, and there can be corpses of a family for example, and your characters says "I hope they didn't suffered too much" or things like that. I don't know, just saying. By the way,I'm Argentinian, so sorry for the grammatical mistakes.