BrakingBraking action involvesperception time andreaction time.First, you have to decide to push on the brake pedal.That isperception time. Then you have to bring up yourfoot and do it. That isreaction time.Averagereaction time is about 3/4 of a second. But thatis only an average. It might be less with one driverand as long as two or three seconds or more withanother. Age, physical condition, alertness, coordinationand eyesight all play a part. So do alcohol, drugs andfrustration. But even in 3/4 of a second, a vehicle movingat 60 mph (100 km/h) travels 66 feet (20 m). Thatcould be a lot of distance in an emergency, so keepingenough space between your vehicle and others isimportant.And, of course, actual stopping distances vary greatlywith the surface of the road (whether it is pavementor gravel); the condition of the road (wet, dry, icy); tiretread; the condition of your brakes; the weight ofthe vehicle and the amount of brake force applied.Avoid needless heavy braking. Some people drive inspurts — heavy acceleration followed by heavybraking — rather than keeping pace with traffic. This isa mistake. Your brakes may not have time to coolbetween hard stops. Your brakes will wear out muchfaster if you do a lot of heavy braking. If you keep pacewith the traffic and allow realistic following distances,you will eliminate a lot of unnecessary braking.That means better braking and longer brake life.If your engine ever stops while you are driving, brakenormally but do not pump your brakes. If you do,the pedal may get harder to push down. If your enginestops, you will still have some power brake assist.But you will use it when you brake. Once the powerassist is used up, it may take longer to stop andthe brake pedal will be harder to push.4-6
