I don't see a problem with anyone sleeping while the vehicle is in motion, that is aslong as they have some kind of a restraint on themselves, and they are not the driver. LOL

Levity aside...Driving barefoot, believe it or not, helps to keep you awake. Not sure why, but was told that by some friends, and it does seem to help. Of course if I am really really sleepy I pull off and get some sleep, it is nothing to take a chance with.