Buick RIVIERA 1993 Manual page 167

Driving in the Rain
It's always wise to go slower and be cautious if rain
starts to fall while
you are
driving. The surface may get
wet suddenly when your reflexes are tuned for driving
on dry pavement.
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. Road spray can often be worse for
vision than rain, especially if it comes from a dirty road.
So it is 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.
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 much tread left, you'll get
even less traction.
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