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 n~ore
of those control systems than the tires
and road can provide. That means
~OLI can lose control
of your vehicle.
Braking
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
rem-tion time.
Average remtio/1 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
lnph ( 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
tread; and the condition
of your brakes.
e (mvel); the condition of the road (wet, dry, icy): tire
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Steering
Power Steering
If you lose power steering assist because the engine
stops or the system is not functioning, you
can steer but
it will take much more effort.
Magnasteer TM
Your vehicle is equipped with GM Magnasteer”, a
steering system that continuously adjusts
the effort you
feel when steering at all vehicle speeds.
It provides ease
when parking yet a firm, solid feel at highway speeds.
Steering Tips
Driving on Curves
It’s important to take curves at a reasonable speed.
A lot of the “driver lost control” accidents mentioned on
the news happen on curves. Here’s
why:
Experienced driver or beginner, each of us is subject to
the same laws of physics when driving on curves. The
traction
of the tires against the road surface makes it
possible for the vehicle to change its path when you turn
the front wheels.
If there’s no traction, inertia will keep
the vehicle going
in the same direction. If you’ve ever
tried
to steer a vehicle on wet ice, you’ll understand this. The
traction
you can get in a curve depends on the
condition of your tires and the road surface, the angle at
which the curve is banked, and yo~lr speed. While
you’re
in a curve, speed is the one factor YOLI can
control.
Suppose you’re steering through a sharp curve. Then
you suddenly accelerate. Both control systems
--
steering and acceleration -- have to do their work where
the tires meet the road. Unless your traction control
system is on, adding the sudden acceleration can
demand
too much of those places. You can lose control.
What should
Y~LI do if this ever happens‘? Ease up on the
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
YOLI’II want to go slower.
If YOLI need to reduce your speed as you approach a
curve, do
it before YOLI enter the curve, while your front
wheels are straight ahead.
Try to adjust YOLI~ 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.
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0 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.)
0 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.
0 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 Aurora‘s
three control systems.
In the braking skid your wheels
aren’t rolling.
In the steering or cornering skid, too
much speed or steering 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 is best handled by easing your foot off
the accelerator pedal.
Remember:
Any traction control system helps avoid
only the acceleration skid.
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If your traction control system is off, then an
acceleration skid is also best handled by easing your
foot
off the accelerator pedal.
If your vehicle starts to slide, ease your foot
off the
accelerator pedal and quickly steer the way you want the
vehicle to
go. If yo11 start steering quickly enough, your
vehicle may straighten out. Always be ready for a
second skid
if it occurs.
Of course, traction is reduced when water, snow, ice,
gravel, or other material is on the road. For safety, you’ll
want to
slow down and adjust your driving to these
conditions.
It is important to slow down on slippery
surfices because stopping distance
will be longer and
vehicle control more limited.
While driving
on a surface with reduced traction, try
your best to avoid sudden steering, acceleration, or
braking (including engine braking by shifting
to a lower
gear). Any sudden changes could cause the tires
to slide.
You may not realize the surface is slippery
until your
vehicle is skidding. Learn to recognize warning clues
--
such as enough water, ice or packed snow on the road to
make a “mirrored surface”
-- and slow down when you
have any doubt.
Remember:
Any anti-lock brake system (ABS) helps
avoid only the braking skid.
Driving at Night
m
Night driving is more dangerous than day driving. One
reason is that some drivers are likely to be impaired
--
by alcohol or drugs, with night vision problems, or by
fatigue.
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Keep your windshield and all the glass on your vehicle
clean
-- inside and out. Glare at night is made much
worse by dirt
on the glass. Even the inside of the glass
can build up a film caused by dust. Dirty glass makes
lights dazzle and flash more than clean glass would,
making the pupils
of your eyes contract repeatedly.
Remember that your headlamps light up f’ar less of a
roadway when you are
in a turn or curve. Keep your
eyes moving; that way, it’s easier to pick out dimly
lighted objects. Just as your headlamps should be
checked regularly for proper aim,
so should your eyes
be examined regularly. Some drivers suffer
from night
blindness
-- the inability to see in dim light -- and aren’t
even aware
of it.
Driving in the Rain
Rain and wet roads can mean driving trouble. On a wet
road you can’t
stop, accelerate or turn as well because
your tire-to-road traction isn’t
as good as on dry roads.
And,
if your tires don‘t have lnuch tread left, you’ll get
even
less traction. It’s always wise to go slower and be
cautious if-’ rain starts to fall while you are driving. The
surfice may
get wet suddenly when your reflexes are
tuned for driving
on dry pavement.
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The heavier the rain. the harder it is to see. Even if your
windshield wiper blades are
in good shape, a heavy rain
can make
it harder to see road signs and traffic signals,
pavement markings,
the edge of the road, and even
people walking.
It’s wise
to keep your wiping equipment in good shape
and keep your windshield washer tank filled. Replace
your windshield wiper inserts when they show 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
The water may affect your brakes. Try
to avoid puddles.
But if you can‘t, try to slow down before you hit them.
c wing through some car washes can cause problems, too.
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
it has little or no contact with the road.
i= wing fast enough. When your vehicle is hydroplaning,
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Hydroplaning doesn‘t happen often. But it can if your
tires haven’t much tread or
if the pressure in one or
more is low.
It can happen if a lot of water is standing on
the road.
If you can see reflections from trees, telephone
poles, or other vehicles, and raindrops “dimple” the
water’s surface, there could be hydroplaning.
Hydroplaning usually happens at higher speeds. There
just isn’t a hard and fast rule about hydroplaning. The
best advice is to slow down when
it is raining.
Some Other Rainy Weather Tips
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Turn on your low-beam headlamps -- not just your
parking lamps
-- to help make you more visible to
others.
Besides slowing down, allow some extra following
distance. And be especially careful when you pass
another vehicle.
Allow yourself more clear room
ahead, and be prepared to have your view restricted
by road spray.
Have good tires
with proper tread depth. (See
“Tires”
in the Index.)
City Driving
One of the biggest problems with city streets is the
amount of traffic on them. You’ll want to watch out for
what the other drivers are doing and pay attention to
traffic signals.
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Here are some things you can check before a trip:
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Wi~~clsl~ield Wcuher F11,fid: Is the reservoir full? Are
all windows clean inside and outside?
Wiper Blcrdes: Are they in good shape?
Fuel, Engine Oil, Other. Fluicls: Have YOLI checked
all levels?
Lunlps: Are they all working? Are the lenses clean?
Tires: They are vitally important to a safe,
trouble-free trip.
Is the tread good enough for
long-distance driving? Are the tires all inflated to the
recommended pressure'?
Weatl?er Forecnsts: What's the weather outlook
along your route? Should
you delay your trip a short
time to avoid a major storm system?
Mcrps: Do you have up-to-date maps'?
Highway Hypnosis
Is there actually such a condition as "highway nypnosis"?
Or is
it just plain fdling asleep at the wheel? Call it
highway hypnosis, lack of awareness, or whatever.
There
is something about an easy stretch of road with
the same scenery, along with the
hum of the tires on the
road, the drone of the engine, and the rush of the wind
against the vehicle that can make you sleepy. Don't let it
happen to you!
If it does, your vehicle can leave the
road
in less tlml u second, and you could crash and be
injured.
What can you do about highway hypnosis? First, be
aware that
it can happen.
Then here are some tips:
0 Make sure your vehicle is well ventilated, with a
comfortably cool interior.
Keep your eyes moving. Scan the road ahead and to
the sides. Check your rearview mirrors and your
instruments frequently.
0 If you get sleepy, pull off the road into a rest, service,
or parking area and take
a nap, get some exercise, or
both. For safety, treat drowsiness on the highway as
an emergency.
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