The passenger cannot drive, not even in a hotel parking lot. I do think the upside is routing and navigating by the passenger while the driver focuses on driving. I know I constantly do math, scenarios, and a few options while I do rallies, but I haven't done anything half the size of the IBR. I have to admit that the advantages of riding two up would be somewhat offset by the challenges of managing two bladders, hunger, sleep needs, and happiness!!!!!