How Often Should You Check Your Mirrors When Driving?

Is There a Rule for How Often You Should Check Your Mirrors?

No. There’s no fixed number of seconds between mirror checks in the Highway Code.

You might have heard that you should check every 5 or 8 seconds. I’ve even had learners tell me they’ve been advised to check every 3 seconds.

At that rate, I’m surprised they’ve got time to look out of the windscreen!

The Highway Code tells drivers to use their mirrors frequently and check them before changing speed or direction.

But the important thing isn’t how many times you look. It’s whether you’re checking at the right time and using the information.

Think Hazards, Not Seconds

Remember the hazard perception part of your theory test?

You’re looking ahead, spotting things that might develop into hazards and deciding when you need to react.

Real driving works in much the same way, except instead of clicking a mouse, you’re making decisions about your speed, position and direction.

And before making those decisions, you need to know what’s happening behind and around you.

That’s where your mirrors come in.

When Should You Check Your Mirrors?

Rather than counting seconds, think about what’s happening on the road and what you’re planning to do.

Here are some everyday situations where mirror checks really matter.

Situation	Why check your mirrors?
Before slowing down or braking	To see how close following traffic is and help you plan a safe reduction in speed
Before turning left or right	To check for vehicles, cyclists or motorcyclists alongside or behind you
Before changing lanes	To check whether the lane you’re moving into is clear, alongside a blind-spot check
Before passing parked vehicles	To assess traffic behind and alongside before changing your position
Before moving off	To check surrounding traffic, alongside appropriate blind-spot observations
After joining a new road	To update your awareness of traffic around you

You should also keep checking your mirrors as the situation develops. One look several seconds ago doesn’t tell you what’s happening now.

And remember, mirrors don’t replace looking ahead. You need both!

Why Checking Your Mirrors Early Can Keep You Safer

Let’s imagine you’re driving along and spot a hazard ahead. Perhaps there’s a pedestrian approaching a crossing or traffic beginning to queue.

You know you’re going to need to slow down.

Now imagine there’s a large lorry following quite closely behind you.

> Scenario one: You leave your mirror check until the last moment.

You check, see the lorry and realise it’s much closer than you’d like.

You still need to slow down safely, but you’ve left yourself less time to plan.

> Scenario two: You check your mirror as soon as you recognise the developing hazard.

You spot the lorry early.

Now you’ve got more time to assess the situation, ease off the accelerator where appropriate and slow down progressively rather than braking sharply at the last moment.

Of course, you must still respond safely to the hazard ahead. You can’t ignore a pedestrian or delay necessary braking because somebody is following too closely.

But early observations give you more information and more options.

That’s the real purpose of mirror checks: giving yourself time to make better decisions.

And believe me, having a plan is considerably better than having a panic!

Which Mirrors Should You Check?

Your car has three mirrors, and each gives you different information.

Interior (Rear-View) Mirror

Your interior mirror gives you a view of the road directly behind.

It’s particularly useful when assessing following traffic before slowing down, braking or changing your speed.

Left and Right Door Mirrors

Your door mirrors help you see traffic to either side and behind your vehicle.

They’re especially important when turning, changing lanes, passing parked vehicles or adjusting your road position.

For example, before turning left, checking your left door mirror could help you spot a cyclist approaching alongside.

Ian’s tip: Don’t just perform a mirror-checking routine because you’ve been told to. Ask yourself what you’re looking for and what you might need to do differently because of what you see.

What About Blind Spots?

Here’s something worth remembering: mirrors don’t show you everything.

There are areas around your vehicle that you can’t see properly in your mirrors. These are called blind spots.

Before moving off, changing lanes or making certain manoeuvres, you may need to physically look over your shoulder to check these areas.

A quick glance in your mirror doesn’t guarantee there’s nothing beside you, particularly a cyclist or motorcyclist.

And while we’re on the subject, don’t forget to check for cyclists and pedestrians when opening your car door after parking.

Can You Fail Your Driving Test for Not Checking Your Mirrors?

Yes. Failing to make effective observations can result in a driving fault, or potentially a serious or dangerous fault if your actions create sufficient risk.

During your practical driving test, the examiner is looking for appropriate observations and safe decisions.

Common mistakes include:

• Braking or slowing down without checking following traffic when appropriate.
• Turning without checking the relevant mirrors.
• Changing lanes without effective observations.
• Checking mirrors too late to act on what you’ve seen.
• Looking in the mirrors but failing to respond to another road user.

But here’s something I want learners to understand.

The examiner isn’t counting how many times you check your mirrors.

They’re assessing whether you’re aware of your surroundings and using that information to drive safely.

And no, you don’t need to dramatically swing your head around every time you look at a mirror!

Make proper, purposeful observations. Don’t just flick your eyes towards a mirror without actually taking in what you see.

How Can You Get Better at Remembering Mirror Checks?

If you’re learning to drive and keep forgetting your mirrors, try changing how you think about them.

Instead of telling yourself, “I must remember to check my mirrors,” ask:

“What am I about to do, and who could it affect?”

For example:

• Traffic lights ahead are turning red. Who’s following me?
• There’s a parked car ahead. Is anyone approaching from behind before I move out?
• I’m turning left. Could a cyclist be alongside me?
• I’m joining another road. What’s happening around my car?

With practice, checking mirrors becomes a natural part of planning your driving rather than something you have to consciously remember every few seconds.

And if you’re struggling, ask your instructor to explain what information they’re looking for in a particular situation.

Understanding why makes a huge difference.

Passed Your Test? Don’t Forget Your Mirrors!

Once you’ve passed, there’s no examiner sitting beside you watching your every move.

But that doesn’t make mirror checks any less important.

In fact, as you become more confident, it’s easy to develop habits you don’t even realise you’ve picked up.

Whether you’ve been driving for six months or twenty years, it’s worth occasionally asking yourself whether you’re checking your mirrors early enough and actually using the information.

If you’ve been away from driving for a while or feel your confidence has slipped, a few refresher lessons can help sharpen those observation skills.

So, How Often Should You Check Your Mirrors?

Back to our original question.

As often as the situation requires.

Check frequently to maintain awareness, and always make appropriate observations before changing speed or direction.

Don’t count seconds. Don’t just go through the motions. And don’t wait until the last possible moment.

Look, understand what you’re seeing and use that information to make safer decisions.

That’s what good driving is all about.

And if you remember nothing else from this article, remember this:

Your mirrors aren’t there just to help you pass your driving test. They’re there to help you avoid trouble in the first place.

If you’ve got a question about mirror checks, driving lessons or anything else driving-related, you’re welcome to email me at ian@revolutiondrivinglessons.co.uk.

Ian – Revolution Driving School