Braking
Braking action involves perception time and reaction
time.
First, you nave
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.
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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.
Most drivers treat their brakes with care. Some,
however, overwork the braking system with poor
driving habits.
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.
Don’t “ride” the brakes by letting your left foot rest
lightly on the brake pedal while driving.
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“Riding” your brakes can cause th%m to overhed
to the point that they won’t work well. You might
not be able to stop your vehicle in time to avoid
an accident.
If you “ride” your brakes, they will
get
so hot they will require a lot of pedal force to,
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“Riding” the brakes rs them out K%ch faster.
You would need costly brake replacement much
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economy.
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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.
0 If your engine ever stops while you’re driving, brake
normally but don’t pump your brakes.
If you do, the
pedal may get harder to push down.
If your engine
stops, you will still have some power brake assist.
But you will
use it when you brake. Once the power
assist is used up, it may take longer to stop and the
brake pedal will be harder to push.
Anti-Lock Brakes (Option)
If your Buick has this system, your Buick has an
advanced electronic braking system that will help
prevent skidding.
If you have an anti-lock brake system (ABS), the brake
pedal will say
so. And this light on the instrument panel
will go
on when you start your vehicle.
When you start your vehicle
and begin to drive away,
you may hear a momentary motor or clicking noise. And
you may even notice that your brake pedal moves a little
while this is going on. This is the
ABS system testing
itself. If you have your foot
on the brake pedal, this
check won’t happen until the vehicle goes about
4 mph
(6 km/h) or until you take your foot off the brake pedal.
After an
ABS stop, you may hear a clicking noise the
next time the vehicle goes about 4 mph (6 km/h).
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If there’s a problem with the anti-lock brake system, the
anti-lock brake system warning light will stay
on or
flash.
See “Anti-lock Brake System Warning Light”
in the
Index.
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Here’s how anti-lock works. Let’s say the road is wet.
You’re driving safely. Suddenly an animal jumps
out in
front of you.
You slam on the brakes. Here’s what happens with ABS.
A computer senses that wheels are slowing down. The
computer separately works the brakes at each front
wheel and at the rear wheels.
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A LAUTION:
The brake wear warning sound means that
sooner or later your brakes won’t work well. Thal
could lead to an accident. When you hear the
brake wear warning sound, have your vehicle
serviced
NOTICE:
Continuing to drive with worn-out ‘-ake pat-
could result in costly brake repair
Some driving conditions or climates may cause a brake
squeal when the brakes are first applied or lightly
applied. This does
not mean something is wrong with
your brakes.
Brake linings should always be replaced as complete
axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does not return to
normal height, or if there is a rapid increase in pedal
travel. This could be a sign
of brake trouble.
Brake Adjustment
Every time you make a moderate brake stop, your disc
brakes adjust for wear.
If you rarely make a moderate or heavier stop, then your
brakes might not adjust correctly.
If you drive in that
way, then
-- very carefully -- make a few moderate
brake stops about every
1000 miles (1600 km), so your
brakes will adjust properly.
Braking in Emergencies
At some time, nearly every driver gets into a situation
that requires hard braking.
If you have anti-lock, you can steer and brake at the
same time. However, if
you don’t have anti-lock, your
first reaction
-- to hit the brake pedal hard and hold it
down
-- may be the wrong thing to do. Your wheels can
stop rolling. Once
they do, the vehicle can’t respond to
your steering. Momentum will carry it in whatever
direction it was headed when the wheels stopped rolling.
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What should you do if this ever happens? Let up on the
brake or accelerator pedal, steer the vehicle the way you
want it to
go, and slow down.
Speed limit signs near curves warn that
you should
adjust your speed. Of course, the posted speeds are
based on good weather and road conditions. Under less
favorable conditions you’ll want to
go slower.
If you need to reduce your speed as
you approach a
curve, do it before
you enter the curve, while your front
wheels are straight ahead.
Try to adjust your speed
so you can “drive” through the
curve. Maintain a reasonable, steady speed. Wait to
accelerate until you are out
of the curve, and then
accelerate gently
into the straightaway.
When you drive into a curve at night, it’s harder to see
the road ahead of you because it bends away from the
straight beams
of your lights. This is one good reason to
drive slower.
Steering in Emergencies
There are times when steering can be more effective
than braking. For example,
you come over a hill and
find a truck stopped in your lane, or a car suddenly pulls
out from nowhere, or a child darts out from between
parked cars and stops right in front
of you. You can
avoid these problems by braking
-- if you can stop in
time. But sometimes
you can’t; there isn’t room. That’s
the time for evasive action
-- steering around the
problem.
Your Buick can perform very well in emergencies like
these. First apply your brakes
-- but, unless you have
anti-lock, not enough to lock your wheels. It is better to
remove as much speed
as you can from a possible
collision. Then steer around the problem, to the left or
right depending on the space available.
An emergency like this requires close attention and a
quick decision. If you are holding the steering wheel at
the recommended
9 and 3 o’clock positions, you can
turn it a
full 180 degrees very quickly without removing
either hand.
Rut you have to act fast, steer quickly, and
just as quickly straighten
the wheel once you have
avoided the object. You must then be prepared
to steer
back to your original lane and then brake to a controlled
stop.
Depending on your speed, this can be rather violent for
an unprepared driver. This
is one of the reasons driving
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you need only slow down and drop back again and
wait
for another opportunity.
If other cars are lined up to pass a slow vehicle, wait
your turn. But take care that someone isn’t trying to
pass you as you pull out to pass the slow vehicle.
Remember to glance over your shoulder and check
the blind spot.
Check your mirrors, glance over your shoulder, and
start your left lane change signal before moving out
of the right lane to pass. When you are far enough
ahead of the passed vehicle to see its front
in your
inside mirror, activate your right lane change signal
and move back into the right lane. (Remember that
your right outside
mirror is convex. The vehicle you
just passed may seem to be farther away from
you
than it really is.)
Try not to pass more than one vehicle at a time
on
two-lane roads. Reconsider before passing the next
vehicle.
Don’t overtake a slowly moving vehicle too rapidly.
Even though
the brake lights are not flashing, it may
be slowing down or starting to turn.
If you’re being passed, make it easy for the
following driver to get ahead of you. Perhaps
you
can ease a little to the right.
Loss of Control
Let’s review what driving experts say about what
happens when the three control systems (brakes, steering
and acceleration) don’t have enough friction where the
tires meet the road to do what the driver has asked.
In any emergency, don’t give up. Keep trying
to steer
and constantly seek an escape route or area of less
danger.
Skidding
In a skid, a driver can lose control of the vehicle.
Defensive drivers avoid most skids by taking reasonable
care suited to existing conditions, and by not
“overdriving” those conditions. But skids are always
possible.
The three types
of skids correspond to your Buick’s
three control system.s. In
the braking skid your wheels
aren’t rolling. In the steering or cornering skid,
too
much speed or steeri.ng in a curve causes tires to slip and
lose cornering force.
And in the acceleration skid too
much throttle causes the driving wheels to spin.
A cornering skid and an acceleration skid are best
handied by easing your foot off the accelerator pedal.
If your vehicle starts
to slide (as when you turn a corner
on a wet, snow- or ice-covered road), ease your
foot off
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signs of streaking or missing areas on the windshield, or
when strips
of rubber start to separate from the inserts.
Driving too fast through large water puddles or even
going through some car washes can cause problems,
too.
The water may affect your brakes. Try to avoid puddles.
But if
you can’t, try to slow down before you hit them.
A CAUTION:
Wet brakes can cause accidents. They won’t
work well in a quick stop and may cause pulling
to one side. You could lose control
of the vehicle.
After driving through a large puddle
of water or a
car wash, apply your brake pedal lightly until
your brakes work normally.
Hydroplaning
Hydroplaning is dangerous. So much water can build up
under your tires that they can actually ride on the water.
This can happen if the road
is wet enough and you’re
going fast enough. When your vehicle is hydroplaning,
it has little or no contact with the road.
You might not be aware of hydroplaning. You could
drive along for some time without realizing your tires
aren’t in constant contact with the road. You could find
out the hard way: when you have to slow, turn, move out
to pass -- or if you get hit by a gust of wind. You could
suddenly find yourself out
of control.
Hydroplaning doesn’t happen often. But it can if your
tires haven’t much tread or if the pressure in one or
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If you are on a three-lane freeway, treat the right lane as
the slower-speed through lane, the middle lane
as the
higher-speed through lane, and the left lane as the
passing lane.
Before changing lanes, check your rearview mirrors.
Then use your turn signal.
Just before you leave the lane, glance quickly over your
shoulder
to make sure there isn’t another vehicle in your
“blind” spot.
If you are moving from an outside to a center lane on a
freeway having more than two lanes, make sure another
vehicle isn’t about to move into the same spot. Look at
the vehicles two lanes over and watch for telltale signs:
turn signals flashing, an increase in speed, or moving
toward the edge
of the lane. Be prepared to delay your
move.
Once
you are moving on the freeway, make certain you
allow a reasonable following distance. Expect
to move
slightly slower at night.
Leaving the Freeway
When you want to leave the freeway, move to the proper
lane well in advance. Dashing across lanes at the last
minute is dangerous.
If you miss your exit do not, under any
circumstances, stop and back up. Drive
on to the
next exit.
At each exit point is a deceleration lane. Ideally it
should be long enough for
you to enter it at freeway
speed (after signaling, of course) and then do your
braking before moving onto the exit ramp.
Unfortunately, not all deceleration lanes are long enough
-- some are too short for all the braking. Decide when to
start braking. If you must brake
on the through lane, and
if there is traffic close behind you, you can allow
a little
extra time and flash your brake lights (in addition to
your turn signal) as extra warning that you are about to
slow down and exit.
The
exit ramp can be curved, sometimes quite sharply.
The exit speed is usually posted. Reduce your speed
according to your speedometer, not to your sense
of
motion. After driving for any distance at higher speeds,
you may tend to think you are going slower than you
actually are. For example,
40 mph (65 km/h) might
seem like
only 20 mph (30 km/h). Obviously, this could
lead
to serious trouble on a ramp designed for 20 mph
(30 km/h)!
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