How to Adjust Your Mirrors to Eliminate Blind Spots
Most drivers set their side mirrors to show a sliver of their own car, which feels reassuring but actually creates overlap with what the rearview mirror already shows you, and leaves a much bigger blind spot to the sides. A different setup, used by driving instructors for decades, nearly eliminates the blind spot altogether without adding any new hardware.
Why the "Standard" Mirror Setup Fails
If you can see the side of your own car in your side mirrors, you're duplicating your rearview mirror's field of view. A car passing you on either side disappears from all three mirrors at once, right in the zone where you most need to see it, and only reappears once it's nearly beside your door. That gap is the blind spot, and it's created by the setup, not by physics.
How to Set Your Mirrors Correctly
- Set your rearview mirror normally, centered on the view straight back through the rear window.
- Lean your head to the left until it touches the driver's window, then adjust the left side mirror outward until you can just barely see the side of your car.
- Lean to the right toward the center console, then adjust the right side mirror outward the same way, until the side of your car just barely appears.
- Sit back in your normal driving position. Your own car should no longer be visible in either side mirror.
What Changes Once They're Set Right
A car overtaking you now hands off smoothly from your rearview mirror to your side mirror to your peripheral vision, with no gap where it disappears. You'll still want to glance over your shoulder before changing lanes, mirrors alone shouldn't replace that habit, but the blind spot you're checking for gets dramatically smaller. It's a five-minute adjustment that removes one of the most common causes of lane-change collisions, and it costs nothing.
Build It Into Your Routine
Mirror position drifts over time, especially if more than one person drives the car, so it's worth checking before longer trips. Pairing correct mirror setup with the habit of scanning well ahead of you is one of the simplest defensive driving strategies there is, and it takes almost no effort once it's part of your routine.