GMC 2008 Envoy - Manual (Page 264)

Driving at Night
Night driving is more dangerous than day driving
because some drivers are likely to be impaired — by
alcohol or drugs, with night vision problems, or by
fatigue.
Night driving tips include:
• Drive defensively.
• Do not drink and drive.
• Reduce headlamp glare by adjusting the inside
rearview mirror.
• Slow down and keep more space between you and
other vehicles because your headlamps can only
light up so much road ahead.
• Watch for animals.
• When tired, pull off the road.
• Do not wear sunglasses.
• Avoid staring directly into approaching headlamps.
• Keep the windshield and all glass on your vehicle
clean — inside and out.
• Keep your eyes moving, especially during turns or
curves.
No one can see as well at night as in the daytime.
But, as we get older, these differences increase.
A 50-year-old driver might need at least twice as much
light to see the same thing at night as a 20-year-old.
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