Tips for Braking on Roads Don't lock your wheels When the brakes on a car are merely close to locking, the braking force is some 30% greater than when the brake is fully applied, locking the wheels in a sliding, screeching, smoke-belching stop. Locked wheels slow down the car so much less quickly because the braking surface is the pavement and a film of molten rubber where the tire contacts it, rather than carefully-e...[more]...