HitchBOT the robot successfully hitchhiked across Canada last year. People would pick him up on the side of the road, strap him in and take him to a new destination. No problem.
HitchBOT is 3 1/2 feet tall and weighs fifteen pounds. It's made out of household and salvage items and traversed Canada by hitchhiking, going from Halifax, Nova Scotia to Victoria, British Columbia! Oh yeah, hitchBOT speaks with a female voice but, in reality, is gender neutral.