Buick PARKAVENUE 1995 Owner's Manual Page 157

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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’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 time
and
reaction
time.
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 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
3/4
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’s pavement or
gravel);
the
condition
of
the road (wet, dry, icy); tire
tread; and the condition
of
your brakes.
4-5
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