1994 Chevrolet Astro Owner's Manual - Page 169

Hydroplaning Hydroplaning is dangerous. So much water can build up under yourtires 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. Hydroplaning doesn't happenoften. 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 justisn't a hard and fast rule about hydroplaning. The best advice is to slow down when is it raining. Some Other Rainy Weather Tips Turn on your low-beam headlights - not just your parking lights - to help make you morevisible 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 for what the other drivers are doing and pay out attention to traffic sianals. 4-15