alt Hacker NewsA Walk Across America was amazing reading when I was college aged. I've never forgotten the story about the accident when he and his (then-girlfriend?) were walking along a quiet highway, I think in Nevada, and they decided to walk on the wrong side of the road, against his usual rules, because it had a shoulder.
And, she landed in the hospital after a car hit them.
I think they got married in New Orleans, before they started the rest of the walk together.
Peter and Barbara didn't do so well after that trip. One of their kids took a road trip with his mom recently, retracing their route from New Orleans to Oregon. He wrote a book about their road trip, and it was a pretty interesting read: https://www.jedidiahjenkins.com