One
of the big hazards of rainstorms for
drivers is hydroplaning, when your car loses contact with the ground, and
instead floats uncontrollably on a layer of water. It seems impossible–a
ton of vehicle being undone by less than a quarter-inch of water–but any heavy
rain is guaranteed to bring hydroplaning wrecks.
Hydroplaning
happens when the water on the road in front of your tires accumulates faster
than your tires can push it out of the way. The water
forces its way between the road and the tire, and raises the car via water
pressure. Not a lot, just a tiny fraction of an inch… but that’s enough to make
your car “float.”
The
effect is like hitting a patch of ice–you lose control, including the ability
to brake and steer.
The following factors that contribute to the risk of hydroplaning during a storm:
1.
Depth of Tire Tread. Another good reason to check your tire
tread–worn tires can’t channel water away, and are more likely to cause
hydroplaning.
2.
Speed of Car. The faster you’re going, the greater the
risk of hydroplaning. Slow down in a heavy downpour, even if you know the road.
3.
Depth of Water. The deeper the water, the more quickly
you’ll lose traction. But you don’t have to have puddles to be at risk–even a strong
rain can build up quickly.
It
can be difficult to tell if you are hydroplaning before that frightening moment
when you realize you have no control:
If
you find yourself beginning to hydroplane, first, don’t panic…don’t apply brakes…don’t try to turn the steering
wheel. These could throw
you car into a skid. Instead:
·
Hold the steering
wheel firmly, and keep going straight.
·
Ease your foot off the
accelerator until you can feel the tires grip the road again, or until you come
to a stop.
·
If you must apply
brakes (and if you have anti-lock brakes), brake with a slow, steady pressure.
Do not “pump” the brakes. The anti-lock mechanism automatically mimics pumping
better than your foot can do it.
It
is always important to drive at speeds appropriate to road conditions, and in a
downpour, water accumulation is one of those “invisible” conditions.
Slow down
in the rain…always.
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