Control Of A Vehicle; Braking - Chevrolet 2007 Kodiak Owner's Manual

Control of a Vehicle

You have three systems that make your vehicle go
where you want it to go. They are the brakes, the
steering, and the accelerator. All three systems
have to do their work at the places where the tires
meet the road.
Sometimes, as when you are driving on snow or
ice, it is 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

See Brake System Warning Light on page 169.
Braking action involves perception time and
reaction time.
First, you have to decide to push on the brake
pedal. That is perception time. Then you have to
bring up your foot and do it. That is reaction time.
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Average reaction time is about three-fourths of
a second. But that is only an average. It might
be less with one driver and as long as two or
three seconds or more with another. Age,
physical condition, alertness, coordination and
eyesight all play a part. So do alcohol, drugs
and frustration. But even in three-fourths of
a second, a vehicle moving at 60 mph (100 km/h)
travels 66 feet (20 m). That could be a lot of
distance in an emergency, so keeping enough
space between your vehicle and others is
important.
And, of course, actual stopping distances vary
greatly with the surface of the road, whether it is
pavement or gravel; the condition of the road,
whether it is wet, dry or icy; tire tread; the condition
of the brakes; the weight of the vehicle; the
weight of the load; and the amount of brake
force applied.