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It’s the amount of alcohol that counts. For example, if
the same person drank three double martinis
(3 ounces
or
90 ml of liquor each) within an hour, the person’s
BAC would be close to
0.12 percent. A person who
consumes food just before or during drinking will have a
somewhat lower BAC level.
There
is a gender difference, too. Women generally have
a lower relative percentage of body water than men.
Since alcohol is carried in body water, this means that a woman
generally will reach a higher BAC level than a
man of her same body weight when each has the same
number of drinks.
The law in many
U.S. states sets the legal limit at a BAC
of
0.10 percent. In a growing number of U.S. states, and
throughout Canada, the limit is
0.08 percent. In some
other countries it’s even lower. The BAC limit for all
commercial drivers
in the U.S. is 0.04 percent.
The BAC will be over
0.10 percent after three to six
drinks (in one hour). Of course, as we’ve seen, it
depends on how much alcohol is in the drinks, and how
quickly the person drinks them.
But the ability to drive
is affected well below a BAC
of
0.10 percent. Research shows that the driving skills
of many people are impaired at a BAC approaching
0.05 percent, and that the effects are worse at night. All
drivers are impaired at BAC levels above
0.05 percent.
Statistics show that the chance of being in a collision
increases sharply for drivers who have a BAC
of
0.05 percent or above. A driver with a BAC level of
0.06 percent has doubled his or her chance of having a
collision. At
a BAC level of 0.10 percent, the chance of
this driver having a collision is twelve times greater; at a
level
of 0.15 percent, the chance is twenty-five times
greater
!
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The body takes about an hour to rid itself of the alcohol
in one
drink. No amount of coffee or number of cold
showers will speed that up.
“I’ll be careful” isn’t the
right answer. What if there’s an emergency, a need to
take sudden action, as when a child darts into the street?
A person with even a moderate BAC might not be able
to react quickly enough to avoid the collision.
There’s something else about drinking and driving that
many people don’t know. Medical research shows that
alcohol in a person’s system can make crash injuries
worse, especially injuries to the brain, spinal cord or
heart. This means that when anyone who has been
drinking
-- driver or passenger -- is in a crash, that
person’s chance of being killed or permanently disabled
is higher than
if the person had not been drinking.
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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.
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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.
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 (ABS)
Your Oldsmobile has an advanced electronic bralung
system that will help prevent a braking skid.
' * \\\
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When you start your vehicle, or when you begin to drive
away, you may hear
a momentary motor or clicking
noise. And
you may even notice that your brake pedal I
moves a little while this is going on. This is the ABS
system testing itself. (You may also hear a clicking noise
if you leave the ignition in the
RUN position for about
four seconds before starting the vehicle.) 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. 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.
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A computer senses that wheels are slowing down. If one
of the wheels is about to stop rolling, the computer will
separately work the brakes at each front wheel and at the
rear wheels.
The anti-lock system can change
the brake pressure
faster than any driver could. The computer
is
programmed to make the most of available tire and road
conditions.
You can steer around the obstacle while braking hard.
As you brake, your computer keeps receiving updates on
wheel speed and controls braking pressure accordingly.
Remember: Anti-lock doesn’t change the time you need
to get your foot up to the brake pedal. If you get too
close
to the vehicle in front of you, you won’t have time
to apply your brakes if that vehicle suddenly slows or
stops. Always leave enough room up ahead
to stop, even
though you have anti-lock brakes.
To Use Anti-Lock
Don’t pump the brakes. Just hold the brake pedal down
and let anti-lock work for you.
You may feel the system
working, or you may notice some noise, but this
is
normal.
If your vehicle has the traction control system, the
LOW TRACTION light will come on when your
anti-lock system
is adjusting brake pressure to help
avoid a braking skid. See “Low Traction Light” in
the Index.
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Traction Control System
(Option:
3800 V6 Engine)
Your vehicle may have a traction control system that
limits wheel spin. This is especially useful in slippery
road conditions. The system operates only if it senses
that one or both of the front wheels are spinning or
beginning to lose traction.
When this happens, the system works the front brakes
and reduces engine power to limit wheel spin.
The LOW TRACTION light will come on when your
traction control system is limiting wheel spin. See
“Low Traction Light” in the Index. You may feel the
system working, or you may notice some noise, but this
is normal.
If your vehicle is in cruise control when the traction
control system begins to limit wheel spin, the cruise
control will automatically disengage. When road
conditions allow you
to safely use it again, you may
re-engage the cruise control. (See “Cruise Control” in
the Index.)
TCS
The TCS warning light will come on to let you know if
there’s a problem with your traction control system.
See “Traction Control System Warning Light’’ in the
Index. When this warning light is on, the system will not
limit wheel spin. Adjust your driving accordingly.
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The light on the button will go off. If the traction control
system is limiting wheel spin when you press the button,
the system won’t turn
off right away. It will wait until
there’s no longer a current need to limit wheel spin.
You can turn the system back on at any time by pressing
the button again. The light on the button should come
on.
Braking in Emergencies
I I I Use your anti-lock braking system when you need to.
With anti-lock,
you can steer and brake at the same
time. In many emergencies, steering can help you more
than even the very best braking.
The
traction control system automatically comes
on
whenever you start your vehicle.
To limit wheel spin, especially in slippery road
conditions,
you should always leave the system on. But
you can turn the traction control system off if you ever
need to.
(You should turn the system off if your vehicle
ever gets stuck
in sand, mud, ice or snow. See “Rocking
Your Vehicle” in the Index.)
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