The hazard perception test is the second part of the car theory test. You watch 14 short video clips of everyday road scenes and click when you see a hazard starting to develop. This guide explains exactly how it works and how it is scored, why some candidates score zero on a clip without realising, and how to practise so that spotting hazards early becomes a habit, which is the whole point of the test.
Last reviewed: September 2026. Checked against the Highway Code and GOV.UK.
The hazard perception test at a glance
All figures below are for the car theory test and were checked on GOV.UK in September 2026.
| Feature | Detail |
|---|---|
| Number of clips | 14 |
| Developing hazards | At least one in every clip; one clip has two, so 15 in total |
| Points per developing hazard | Up to 5 |
| Maximum score | 75 |
| Pass mark | 44 out of 75 |
| Attempts per clip | One. You cannot review or change your responses |
| Wrong clicks | You do not lose points for clicking and getting it wrong |
| Clicking continuously or in a pattern | You score nothing for that clip |
Sources: GOV.UK hazard perception test and pass mark and result pages.
You take the hazard perception test after the multiple-choice part, at the same appointment. GOV.UK says you can have a break of up to 3 minutes before it starts. GOV.UK says you must pass both parts to pass the theory test. If you pass one part and fail the other, you have to book and take the whole test again, and you must wait at least 3 working days before retaking it. Once you pass, your pass certificate number lasts for 2 years, and you need to pass your practical test within that time.
How the test works on the day
Before the clips start, GOV.UK says you will be shown a video about how the hazard perception test works. Watch it properly even if you have practised: it is your last chance to settle into the screen and the mouse.
Each clip shows a short drive from the driver’s point of view. Your job is to click the mouse as soon as you see a hazard starting to develop. You do not need to click on the hazard itself, just click the mouse button. There are no questions to answer and no steering or braking to do.
Three things are worth knowing in advance:
- You only see each clip once. There is no replay and no way to change your responses.
- The clips are computer-generated. DVSA replaced the old filmed clips with CGI (computer-generated imagery) clips on 12 January 2015. GOV.UK’s announcement said the way the test works and the pass mark stayed the same, and that CGI lets DVSA show situations involving vulnerable road users, such as children and cyclists, that would be risky to film for real.
- The clips cover all sorts of roads. Expect town centres, housing estates, country lanes, dual carriageways and motorways, in different weather and light.
What is a developing hazard?
This is the most important idea in the test. GOV.UK defines a developing hazard as “something that would cause you to take action, like changing speed or direction”.
Compare two situations from GOV.UK’s own example:
- A car is parked at the side of the road with nobody in it and nothing happening. That is a potential hazard, but not a developing one. You would keep an eye on it, but you would not change speed or direction yet.
- The same parked car’s right-hand indicator starts flashing and it begins to pull out, so you need to slow down. Now it is a developing hazard, and that is the moment you want to click.
Clips are full of potential hazards: parked cars, side roads, pedestrians on the pavement, a bus at a stop. Most of them never develop. Only the ones that develop into something that makes the driver act are scored.
How scoring works: the 5 to 0 window
GOV.UK says you can score up to 5 points for each developing hazard, and that to get a high score you should click as soon as you see the hazard starting to develop. The full timing of each scoring window is not published by DVSA, but the way the scoring works is widely explained like this:
- Each developing hazard has a scoring window. It opens at the point a hazard starts to develop and closes around the point where the driver would have to react.
- The window is split into five parts. A click in the first part scores 5, then 4, 3, 2 and 1 as the window runs on.
- A click before the window opens or after it closes scores 0 for that hazard.
- Only your best click within the window counts, so clicking two or three times as a hazard develops does not cost you anything.
This is why early, deliberate clicking matters. Spotting a hazard just as it starts to develop gets you the top score. Spotting it late, when the driver would already be braking, earns 1 or nothing.
Because the exact window is not published, nobody outside DVSA can tell you “click 1.5 seconds after X”. Anyone who claims to know the precise timings is guessing. The reliable approach is to click when you, as a driver, would start to act.
Why clicking patterns score zero
Some candidates try to game the test by clicking constantly or in a rhythm, hoping to land a click inside every window. The test is designed to detect this. GOV.UK is clear: “you will not score anything if you click continuously or in a pattern.” If the system decides you have done this during a clip, you get zero for that whole clip, even for hazards you genuinely spotted.
A sensible approach is to click once when you first notice a clue, then again as the hazard clearly develops. Two or three well-spaced clicks per hazard is common and fine. Rapid bursts of clicks, or regular clicking every second or two throughout a clip, are what get flagged.
A practical technique that works
The skills that score well in the test are the same ones that keep you safe on the road. Try this routine for each clip.
1. Scan the whole scene, all the time
Keep your eyes moving: far ahead, the sides of the road, the pavements, side roads and, when shown, the mirrors. Hazards often start at the edges of the picture. Rule 146 of the Highway Code asks you to adapt your driving to the road and traffic conditions and to be ready for the unexpected, which is exactly the mindset you need.
2. Spot the clues before the hazard
Most developing hazards are signposted by a clue a few seconds before they happen:
- a warning sign for a school, junction or bend
- a ball bouncing into the road, or children near an ice cream van (rules 205 and 206 warn about children stepping out, particularly near schools and ice cream vans)
- a pedestrian looking over their shoulder, or waiting at the kerb at a junction you are turning into (the 2022 Highway Code changes gave pedestrians priority when they are crossing or waiting to cross a road you are turning into, rule 170)
- brake lights or indicators on vehicles ahead
- a cyclist or motorcyclist near a junction, where they are often hard to see (rule 211)
- a horse rider ahead on a country lane (rules 214 and 215)
- a bus pulling up at a stop, which may soon pull out or have passengers crossing in front of it
3. Click when the clue becomes a hazard
When you see the clue, it is reasonable to click once. When the situation changes so that a driver would need to slow down, stop or steer, click again. That second click is the one most likely to land in the high-scoring part of the window.
4. Keep watching after you click
A clip can contain a second hazard, and one clip in the test has two. Do not relax after the first one.
Common reasons people fail
The pass mark is 44 out of 75, so you need an average of just under 3 points per hazard. People who fail usually fall into one of these traps.
- Clicking too late. Waiting until the hazard is obvious means you only score 1 or 2 points, or nothing. Across 15 hazards, that adds up quickly.
- Clicking too much. Nervous rapid clicking can be flagged as a pattern, wiping out a whole clip.
- Clicking for every potential hazard. Clicking at every parked car is not harmful by itself, but it can drift into a pattern, and it distracts you from the hazards that actually develop.
- Switching off between hazards. Missing the second hazard in a clip, or losing focus late in the test.
- Only practising the multiple-choice questions. Hazard perception is a skill, and it needs practice with clips, not just reading.
- Not being used to CGI. The computer-generated clips can look unfamiliar at first. Practising with the official clips helps.
How to practise
GOV.UK lists several official ways to prepare. We do not offer interactive hazard perception clips at the moment, so these are the places to go.
- Free practice clips. GOV.UK’s practice theory test page says you can practise with 3 test clips for free. They are not used in the real test, but they show you how it works.
- Official DVSA apps and e-learning. The GOV.UK revision and practice page lists the Official DVSA Hazard Perception app for Apple and Android devices, and the Official DVSA Theory Test Kit online for PC or Mac, which includes hazard perception practice. These are paid products.
- Commentary driving. When you are a passenger, or on lessons, say out loud what you can see that might develop into a hazard. It trains the same scanning habit that the test measures. If you are still looking for someone to teach you, you can compare driving instructors near you.
- Learn the signs. Warning signs are often the first clue in a clip. Our warning signs guide and the road and traffic signs topic will help.
- Revise the related theory topics. Hazard awareness and vulnerable road users cover the thinking behind most clips.
A good revision routine is little and often: a few clips a day in the weeks before your test, rather than a long session the night before.
Frequently asked questions
How many clips are in the hazard perception test?
There are 14 clips. Each has at least one developing hazard, and one clip has two, giving 15 scoreable hazards in total (GOV.UK).
What is the pass mark for hazard perception?
For cars, the pass mark is 44 out of 75. The multiple-choice part has a separate pass mark of 43 out of 50, and you must pass both (GOV.UK, checked September 2026).
Do I lose points for clicking at the wrong time?
No. GOV.UK says you do not lose points if you click and get it wrong. But if you click continuously or in a pattern, you score nothing for that clip.
How many times should I click for each hazard?
There is no official number. Clicking once when you spot the clue and again as the hazard develops is a sensible approach. Only your best click in the scoring window counts, so a couple of deliberate clicks cannot hurt you, while rapid bursts can.
Can I watch a clip again?
No. You only get one attempt at each clip, and you cannot review or change your responses (GOV.UK).
Are the clips real video?
No. Since 12 January 2015, the hazard perception test has used computer-generated (CGI) clips instead of filmed footage. DVSA said at the time that the way the test works and the pass mark stayed the same.
If I fail hazard perception but pass the multiple-choice part, do I only retake hazard perception?
No. You have to book and take the full theory test again, even if you passed one part, and you must wait at least 3 working days (GOV.UK).
How long does my theory test pass last?
Your pass certificate number lasts for 2 years. If you do not pass your practical test within that time, you have to pass the theory test again (GOV.UK).
Next steps
Go to the theory test hub for every topic and the multiple-choice part, then read hazard awareness and vulnerable road users to sharpen the thinking behind the clips. When the theory test is done, the practical test guide explains what comes next.