My mind can't comprehend those walking and biking numbers. The walking is about 70 miles a day. That's more than double the average distance of a one day ultra marathon done everyday for a month and a half. The biking distance is about 255 miles a day. Roughly 2.5x the average daily distance for the Tour de France. I want to meet the people who can do that.
Yep, doing that drive in that time would essentially require at least two people taking shifts driving - or one dangerous madman on some kind of drugs.
I believe it’s assuming you’re not taking breaks, in which case I think they’re a bit more reasonable is expected walking speed but perhaps less reasonable in regards to a persons ability to go without sleeping :)