1998 Chevrolet Astro Owner's Manual - Page 197

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 sludding. 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 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. 4-13