1998 Oldsmobile Aurora Owner's Manual - Page 184

First, you have to decide to push on the brake pedal. That's perception time.Then you have to bring up your foot and do it. That's reaction time. Average reaction time is about 3/4 of a second. But that's only an average. It might less with one driver and as be long as two or three seconds more with another. Age, or physical condition, alertness, coordination and eyesight all play a part. So do alcohol, drugs and frustration. But even in 3/4 of a second, a vehicle moving 60 mph (100 km/h) at travels 66 feet (20 m). That couldbe a lot of distance in an emergency, so keeping enough space between your vehicle and othersis important. And, of course, actual stopping distances vary greatly with the surface of the road (whether it's pavement or gravel); the condition of the road (wet, dry, icy); tire tread; the condition of your brakes; the weight of the vehicle and the amount of brake force applied. Avoid needless heavy braking. Some people drive in spurts -- heavy acceleration followed by heavy braking -- rather than keeping pace with traffic. This is a mistake. Your brakes may not have time to cool between hard stops. Your brakes will wear out much faster if you do a lot of heavy braking. If you keep pace with the traffic and allow realistic following distances, you will eliminate a lot of unnecessary braking. That means better braking and longer brake life. Sometimes, as when you're driving on snow or ice, it's easy to ask more of those control systems than the tires and road can provide. That means you can lose control of your vehicle. Braking Braking action involves perception timeand reaction time.