Mirror Setup 101: How to Reduce Blind Spots on SA Roads

Most drivers think their mirrors are set correctly. After all, you can see behind you, spot cars in the next lane, and you’ve been driving for years.

But here’s the truth: Most mirrors are not adjusted properly, and many drivers have bigger blind spots than they realise.

On South African roads, where taxis, motorbikes, cyclists, and pedestrians share space, even small visibility gaps can lead to serious risks.

Understanding how mirrors work, and how to set them correctly is one of the easiest ways to improve road safety.

The Blind Spot Problem

Every car has blind spots – areas you can’t see through your rearview or side mirrors.

Blind spots are usually:

• Alongside the rear quarter of your car
• Slightly behind the driver’s and passenger’s doors
• Near the back wheels, closer to the ground

If your mirrors are angled too far inward, they overlap with what your rearview mirror already shows. This creates unnecessary duplication and larger blind zones.

Many drivers believe that seeing part of their car in the side mirror means it’s set correctly. This often means the mirror is angled too narrowly.

Why Seeing Your Own Car Isn’t the Goal

A common misconception is that side mirrors should show part of your car. While a slight reference point can help, mirrors are designed to show what’s happening next to you – not your door handle.

When mirrors are angled too far inward:

• The side mirror duplicates the rearview mirror’s view
• Blind spots become wider
• Car in adjacent lanes disappear more easily

Side mirrors should expand your field of view, not repeat it.

How to Adjust Your Mirrors Properly

Adjusting your mirrors is easiest when parked and seated in your normal driving position.

Rearview Mirror

• Adjust it to see directly out of the rear window.
• Centre the view so the full back window is visible.
• Avoid angling it too high or too low.

The rearview mirror is your main view of what’s behind you.

Driver’s Side Mirror

• Sit in your normal driving position.
• Lean your head slightly toward the window.
• Adjust the mirror outward until you can just see the side of your car.

When you sit upright again, your car should no longer dominate the mirror view. Instead, the mirror should show the adjacent lane more clearly.

Passenger Side Mirror

• Lean slightly toward the centre of the car.
• Adjust the mirror outward until you can just see the side of your car.

Because this mirror is further from you, it’s often set too conservatively. Widening its angle improves awareness of traffic in the next lane.

The Role of the Shoulder Check

Even with correctly adjusted mirrors, blind spots don’t disappear completely. That’s why shoulder checks are essential.

Before changing lanes or merging:

1. Check your mirrors.
2. Signal clearly.
3. Perform a quick shoulder glance in the direction you’re moving.
4. Complete the manoeuvre.

The shoulder check confirms nothing is sitting in the small remaining blind zone.

Why Mirror Awareness Matters in South Africa

South African roads demand strong spatial awareness. Consider:

• Motorcycles filtering between lanes
• Taxis changing lanes abruptly
• Cyclists sharing road space
• Pedestrians stepping into traffic
• Heavy traffic with closely packed cars

Poorly adjusted mirrors make smaller road users disappear from view. Mirror awareness isn’t just about cars – it’s about everyone on the road.

Night Driving and Mirror Position

At night, glare from headlights can make mirrors harder to use. Many rearview mirrors have an anti-glare function.

• Use the anti-glare feature if available.
• Keep mirrors clean.
• Avoid tilting mirrors downward to reduce glare – this reduces your view.

Clear visibility is even more important in low-light conditions.

A Simple Self-Test

To test your mirror setup:

1. On a quiet road, let another car overtake you.
2. Watch how it moves from your rearview mirror to your side mirror.

With properly adjusted mirrors:

• The car should move smoothly from the rearview mirror to the side mirror.
• It shouldn’t disappear entirely between views.

If it disappears, your mirrors likely overlap too much.

The Psychology Behind the Myth

Why do so many drivers set mirrors incorrectly?

• We adjust them once and rarely revisit them.
• We copy what we were shown when learning.
• We prioritise seeing our own car as a “reference.”
• We underestimate blind spot size.

Experience doesn’t eliminate blind zones. Only correct setup reduces them.

Small Adjustment, Big Impact

Adjusting your mirrors doesn’t require new equipment, money, or much time. But it directly affects:

• Lane change safety
• Merging confidence
• Overtaking decisions
• Awareness of vulnerable road users

Better mirror coverage gives you more information, leading to calmer, safer decisions.

Conclusion

The belief that “I can see everything” is one of the most common driving myths.

Blind spots are real. Mirror overlap is common. Small adjustments can significantly improve what you see around you.

By setting your mirrors correctly and checking them actively, you strengthen one of the simplest but most powerful road safety habits.

Good visibility doesn’t happen by accident. It happens by adjustment.

Disclaimer

This article is for general road safety information only. Drivers must always comply with South African road traffic laws and perform appropriate mirror and shoulder checks before changing lanes or merging. Prime SA is an Auth FSP 41040.

 

 

Mirror Setup 101: How to Reduce Blind Spots on SA Roadshttps://t.co/35NC6d7ibD#ArriveAlive #BlindSpots #PrimeSouthAfrica pic.twitter.com/JnffBPUXVD

– Arrive Alive (@_ArriveAlive) April 7, 2026