I once had a tom cat run away. A friend brought him back to me, having found him in a market parking lot in town, almost 10 miles away. We don't know if he hitched a ride in the truck, or merely just wandered off, but it was a lucky find to get him back! Especially when it's cold, cats have been known to crawl up into engines to keep warm, and end up miles, even hundreds of miles, away from "home". Not all strays are abandoned. Sadly, some just get lost. Not to say I haven't seen dozens of them tossed out or dumped, even from moving vehicles, but sometimes cats do like to wander, Sometimes they just wander a little too far.