Why would you turn the wheels to the right if parking uphill WITHOUT a curb as compared to turning them to the left if parking uphill WITH a curb? I've googled for explanations and none of them explain the physical processes involved, much to my frustration. Supposedly "If the vehicle rolls, it will go off the road rather than into traffic". Yeah, but wouldn't the uphill-ness make the car roll in the direction OF traffic (i.e. towards the left?) Oh and would a free body diagram work? It's amazingly difficult to draw in the case of two axles+4 wheels. Oh - and an additional question - how do the back wheels steer?