Driving at night asks more of you than driving by day, even on roads you know well. Your field of vision shrinks to the cone thrown by your headlights, colours flatten out, and it becomes genuinely harder to judge how fast something is moving or how far away it is. Add tiredness, oncoming glare and the odd unlit cyclist, and you can see why the theory test takes night driving seriously.
The good news is that almost all of it comes down to two habits: using the right lights at the right time, and matching your speed to what you can actually see. Get those two things working together and night driving becomes calm and predictable rather than a squint-and-hope affair.
This guide walks you through the rules the examiner expects you to know, the mistakes that catch new drivers out, and a few real situations where the right choice keeps everyone safe. Think of it as the difference between driving into the dark and driving through it.
Study time
36 min
Level
Advanced
Confidence
+10%
Practice
34 Qs
What you'll be able to do
- Understand why bad weather stretches your stopping distance so much — and the simple rule that keeps you safe in it.
- Understand which lights to use in rain, fog and gloom — and the one fog-light rule that catches people out.
- Understand how to handle the weather that isn't rain — gusts, dazzling sun, and water across the road.
The facts that matter
- You must use headlights between sunset and sunrise. At dusk and dawn switch them on early — use headlights, not just sidelights, so you're seen.
- Use dipped headlights in built-up areas, when following another vehicle, and when meeting oncoming traffic, so you don't dazzle other drivers.
- Use main (full) beam on unlit roads when the way ahead is clear, but dip it the moment a vehicle approaches or you catch up behind one.
- Always drive so you can stop within the distance lit by your headlights — on dipped beam that means keeping your speed well down. Never overrun your lights.
- If an oncoming driver dazzles you, slow down or stop; look slightly towards the left kerb to keep your line. Never retaliate with full beam.
- Keep your windscreen and lights clean. Judging speed and distance is harder in the dark, and pedestrians, cyclists or animals may carry no lights at all.
Make it stick
Memory anchors
Stop within your lights
Whatever your headlights reach is your stopping zone. If your dipped beam only lights 40 metres of road, you must be able to stop in 40 metres — so drop your speed to match. On main beam you can see further, so you can carry a little more pace; on dipped beam, slow down. Never drive faster than you can see.
Dip for D's
Dip your beam for anything that starts with a mental 'D': the Distance of a car ahead, a Driver coming towards you, and the Densely built-up town. Main beam is only for the open, empty, unlit road — the moment company arrives, dip.
Stay sharp
The mistakes everyone makes
Leaving main beam on too long
Many new drivers flick to main beam on a dark road and then forget it's on, blinding the driver coming the other way or the car they've just caught up behind. Dip as soon as you see oncoming lights or close in on a vehicle ahead — dazzling someone who then swerves is far more dangerous than a few seconds of shorter vision for you.
Retaliating against dazzle
When an oncoming car dazzles you, the instinct is to switch your own main beam on 'to teach them a lesson'. That just blinds them too, and now two dazzled drivers are heading towards each other. Instead, slow down, avoid staring at the lights, and glance towards the left kerb to hold your position until they pass.
Relying on sidelights at dusk
Sidelights make you a bit more visible but they don't light the road, and in the half-light of dusk or dawn that's not enough. Switch to headlights early — being seen and seeing properly both matter when the light is fading and other drivers are also struggling to judge distances.
Out on the road
What this looks like in real life
The country lane at midnight
You're on an unlit rural road with no traffic, so you're using main beam and can see well into the distance. A pair of headlights crests the hill ahead. You dip immediately, before they reach you, so neither of you is dazzled. As the car passes you keep your eyes towards the left kerb, then flick back to main beam once its tail lights are behind you. Because your speed was already set to what you could see, nothing about the encounter felt rushed.
The unlit cyclist on the way home
On a dipped-beam road through a village, a cyclist ahead has no rear light — you only pick them out when your beam finally reaches them. Because you were driving so you could stop within your lights, you have time to slow and pass with plenty of room. Had you been travelling faster than your beam allowed, that cyclist would have appeared far too late. It's the perfect argument for never overrunning your lights: the hazard you can't see yet is exactly the one the rule protects you from.
Quick answers
Frequently asked questions
When do I have to switch my headlights on?
Legally you must use headlights between sunset and sunrise. In practice, switch them on early — at dusk and dawn, and in any poor daytime light — and use headlights rather than just sidelights so you both see the road and are clearly seen by others.
What's the difference between dipped and main beam, and when do I use each?
Dipped beam points down and to the left so it lights the road without dazzling others — use it in built-up areas, when following another vehicle, and when meeting oncoming traffic. Main (full) beam reaches much further and is for unlit roads when the way ahead is clear. Dip it the instant a vehicle approaches or you catch up behind one.
An oncoming driver is dazzling me — what should I do?
Slow down or, if you really can't see, stop. Avoid looking straight at the lights and instead glance towards the left kerb to keep your road position. Never switch your own main beam on in retaliation — that just dazzles them as well and makes the whole situation more dangerous.
Should I use my fog lights at night to see better?
No. Fog lights are only for genuinely reduced visibility — roughly below 100 metres — and must be switched off once it clears, because they dazzle other drivers and can be mistaken for brake lights. On a normal dark night your dipped and main beam headlights are the correct tools.
Turn driving at night into marks
Reading builds understanding — practice makes it stick. Pick up where this guide leaves off, free.
Revision checklist
0/6Tick each point once you can explain it without looking.