Koltnow ultimately got to Yuma in a few days. Years later, the series of postcards he sent to Witter became part of a
Smithsonian exhibition on transportation history. But that's not because his trip was at all unusual — it's because the postcards are a remarkably detailed record of a once-routine transportation mode that has essentially vanished.
Nowadays, hitchhiking is perceived as dangerous, and few drivers are willing to pick someone up. Police departments discourage it, and many states
explicitly ban it. Most hitchhikers have no other options, and do so as a last resort.
"Dating back to the Depression and World War II, it used to be very normal to see someone sticking their thumb out and pick them up," says
Alan Pisarski, a transportation researcher. "We lost that somewhere along the way."
For people too young to remember the age of hitchhiking, it brings up a perplexing question: what happened?