Drowsy Driving Prevention Week, organized by the National Sleep Foundation, runs November 2–8, 2025. It's timed deliberately: daylight saving time ends November 2, clocks fall back, and suddenly your commute home is in complete darkness.
Most of the awareness campaign — rightfully — focuses on driver behavior. Don't drive exhausted. Pull over and rest. Recognize the warning signs. All good advice.
But there's a vehicle maintenance angle that gets ignored almost entirely: in the dark, your car's safety systems matter more than they do during daylight hours. And deferred maintenance on those systems isn't just an inconvenience — it's a hazard.
Headlights: More Than Just Seeing
Faded, yellowed headlight lenses can reduce your effective light output by 80% or more compared to clear lenses. You might think your headlights are on and working fine. But if you're driving through rural roads at 65 mph with 80% less illumination than you should have, you're seeing hazards much later than you think.
Check your headlights by pulling forward close to a wall at night. Are both beams equally bright? Are the lenses yellowed or hazy? Lens restoration kits cost $20–$30 and take 30 minutes. Replacement bulbs are inexpensive. If lenses are badly degraded, replacement headlight assemblies are often less expensive than you'd expect.
Also check that your headlights are properly aimed — a beam pointing at the ground 10 feet ahead of you is as useless as a dim bulb.
Wipers: Invisible Until You Need Them
Wiper blades don't announce their failure in advance. They just streak or skip when you need clear visibility in rain, sleet, or a passing truck's road spray. In the dark, a streaked windshield doesn't just obscure your view — it creates glare from oncoming headlights that can be genuinely blinding.
Replace wiper blades annually. In the fall. Before winter. It costs $20–$40 to do both yourself.
Windshield Defrosters
Morning commutes after the time change often mean frost. A failed rear defroster means driving with an opaque rear window, which is both illegal and dangerous.
Test your rear defroster now — it's a simple check. Turn it on and watch whether the grid lines actually clear the glass. Feel the glass after a minute or two; it should be noticeably warm. If it's not working, the cause is often a broken grid wire or a blown fuse — both relatively inexpensive to diagnose.
Front windshield defrost (which relies on your HVAC system) should be tested too. If it's blowing cold air or not clearing fog effectively, get it looked at before temperatures drop.
The Connection to Drowsy Driving
Fatigued drivers already have impaired reaction time and reduced situational awareness. Put a fatigued driver in a car with dim headlights, streaking wipers, and a foggy windshield, and every reaction is slower and more error-prone than it needs to be.
The vehicle safety conversation and the driver safety conversation aren't separate. They're the same conversation.
This week, check your headlights, replace your wiper blades if they're more than a year old, and test your defrosters. These are small actions with outsized safety returns.
And if you're not sure where to take your car for a quick fall safety inspection, use our mechanic finder to locate a verified shop near you.