# Why, when parking uphill, driver should steer tires away from curb?

This may very basic, elementary and possibly dumb question but I have to ask.

Why, when parking uphill, driver should steer tires away from curb? Won't steering toward curb also can stop car by rear wheels? Think about it, the car will head in reverse towards the curb, in case if It's break fails, and curb should stop it from back from rolling further.

I guess steering away is more efficient because in other case due to weight of car and due to distance(because rear tires are straight) it may gain a little momentum and roll up on the obstacle of curb and may roll on further dangerously. Is this the theory behind this traffic advice and rule?

EDIT I guess the angle of tire with which it will make contact with curb also makes a difference. Front tires makes a better i.e bigger angle against curb and hence may be a better stopper.

• Your instinct is right. The only problem is your understanding of the word "steer". – Mike Dunlavey Feb 23 '17 at 15:20
• @mike can you be more clear on that? – old-monk Feb 23 '17 at 15:26
• I've always somewhat questioned this reasoning as well (though it's mentioned enough I'm sure they have evidence to back it up). If your tires are able to go over the curb under the influence of gravity, steering away will actually make your car turn right into the road, while turning towards the curb will make your car go over the curb if the back wheels could get over. I assume on a reasonable incline the tire should never have enough energy from gravity to jump the curve, but that's entirely a guess at why this system holds. – JMac Feb 23 '17 at 15:47
• @SaurabhTripathi: Your (correct) instinct is that you should turn the steering wheel so that if the car rolls downhill, the front wheels will roll into the curb and be stopped. So let's see, if you live in India and park on the left-hand side of the road, and you park up-hill, you want to turn the front wheels so that if the car rolls backward, it will roll into the curb - i.e. turn them to the right. If the word "steer" implicitly assumes moving forward then that could be called "steering away from the curb", but you are guarding against backward motion, not forward. – Mike Dunlavey Feb 23 '17 at 16:37