Essential UK Traffic Rules for Learners: What the Highway Code Actually Requires

Last verified 3 August 2026 against the official pages linked below.

The essential traffic rules for UK learners come down to a short list of hard numbers: 30 mph in built-up areas of England and Scotland but 20 mph in Wales, 70 mph on motorways and dual carriageways, 6 penalty points and a £200 fine for holding your phone at the wheel, and a drink-drive limit of 35 micrograms of alcohol per 100 millilitres of breath — just 22 in Scotland. Behind those numbers sits The Highway Code, a document that is part criminal law and part court-admissible guidance, and since January 2022 a hierarchy of road users that changed who gives way to whom at every junction in the country. This guide sets out what the Code legally requires, what it merely advises, and the handful of rules learners get wrong most often — both in the theory test and on the practical.

"MUST" rules are criminal law — and "should" rules can still cost you

Any rule in The Highway Code written with the words MUST or MUST NOT is a legal requirement, and disobeying it is a criminal offence. The Code's introduction is explicit: those rules restate duties from road traffic legislation, and breaking them can mean fines, penalty points or disqualification.

The advisory rules — the ones worded "should/should not" or "do/do not" — are not offences in themselves, but they are far from optional. As the introduction puts it:

The Highway Code may be used in evidence in any court proceedings … to establish liability.

In practice that means ignoring an advisory rule can decide a civil claim against you after a crash, or support a charge of careless driving. Follow another car too closely — advisory in normal conditions — and if it stops suddenly, the Code's guidance on separation distances becomes part of the case for why the collision was your fault. Learners sometimes ask which rules they "really" need to know. The honest answer is all of them: one set can convict you, the other can be used against you.

What is the hierarchy of road users — and what does it change at junctions?

The hierarchy of road users, added to The Highway Code on 29 January 2022, puts the people most at risk in a collision at the top of the priority order — pedestrians first, then cyclists, horse riders and motorcyclists — and gives those who can do the greatest harm the greatest responsibility to reduce danger. It takes the form of three rules at the start of the Code:

• Rule H1 applies to everyone: know the Code, be considerate, and understand your responsibility for the safety of others — with the heaviest burden on those driving the vehicles that can cause the most harm.
• Rule H2 is the one that rewrote junctions. When you are turning into or out of a road, you should give way to pedestrians who are crossing or waiting to cross it. You MUST give way to pedestrians on a zebra crossing, and to pedestrians and cyclists on a parallel crossing.
• Rule H3 protects cyclists and horse riders going straight ahead: do not cut across them when you turn into or out of a junction or change direction or lane, and stop and wait for a safe gap if necessary — including when cyclists are passing slower traffic or travelling around a roundabout.

The practical shift happens at the mouth of every side road. Under the old convention, a pedestrian waiting at the kerb waited for you; since 2022, if you are turning in, the turn is theirs. If your parents or an older supervising driver passed their test before 2022, this is the rule most likely to have passed them by — worth flagging before a practice session, alongside the other rules for supervising a learner driver.

What are the speed limits for cars — and why is Wales different?

For cars, the national limits are 30 mph in built-up areas of England and Scotland, 20 mph in Wales, 60 mph on single carriageways and 70 mph on dual carriageways and motorways, per GOV.UK's speed limits page. Wales moved its default on restricted roads — the street-lit roads through towns and villages — down to 20 mph, and that difference is now a standard theory-test trap.

Three things stop this table being the whole story. First, local councils can set their own limits — a 20 mph zone near an English school, a signed 30 mph stretch in Wales — and signs always override the defaults. Second, a limit is a maximum, not a target: 60 mph on a narrow, wet single carriageway can still amount to careless driving. Third, Northern Ireland caps learner drivers at 45 mph — a restriction that does not exist in Great Britain.

When can you hold your phone while driving? Almost never

It is illegal to hold and use a phone, sat nav, tablet or any device that can send or receive data while driving — including while stopped at traffic lights or queuing in traffic, and even if the device is offline or in flight mode, under the law set out on GOV.UK. The same ban applies to anyone supervising a learner driver from the passenger seat.

Hands-free use is legal: voice commands, a Bluetooth headset, a windscreen or dashboard mount, or a built-in sat nav — provided the device does not block your view of the road and you stay in proper control. Police can still issue 3 penalty points if a mounted device obstructs your view or you are not in control of the vehicle. The exceptions to the holding ban are deliberately narrow: calling 999 or 112 in an emergency when it is unsafe or impractical to stop, being safely parked, making a contactless payment while the vehicle is stationary — the drive-through case — or parking the vehicle remotely.

The penalty is 6 penalty points and a £200 fixed penalty, rising to a maximum £1,000 fine if the case goes to court. For new drivers it is worse still: pass your test and then collect six points within 2 years, and your licence is revoked — the mechanics are covered in our guide to the new-driver six-point rule.

Work the numbers through and a quick glance at a red light becomes the most expensive text you will ever read. Say you passed 14 months ago and pick up your phone in a queue: that is the £200 fine and six points, and — because you are inside the two-year window — a revoked licence. To drive again you are back at square one: a new £34 provisional licence, £23 to resit the theory test and at least £62 for a new practical — £319 minimum before you count fresh lessons or the years of higher insurance premiums that follow a conviction.

How much can you drink and legally drive? There is no safe formula

The limit in England, Wales and Northern Ireland is 35 micrograms of alcohol per 100 millilitres of breath (80 milligrams per 100 millilitres of blood); in Scotland it is 22 micrograms of breath (50 milligrams of blood), per GOV.UK's drink-drive limit page. Notice what those limits are not: a number of drinks. GOV.UK itself says it is impossible to translate the limit into pints or glasses, because the effect of the same drink varies with your weight, age, sex, metabolism, what you have eaten recently and even your stress levels at the time.

That is why "one pint is fine" is a myth rather than a rule. The pint that leaves one person under the limit puts another over it, and in Scotland — where the threshold is roughly a third lower — a single drink is enough to take some people past 22 micrograms. There is no calculation a driver can safely rely on, which makes the real rule simple: if you are driving, do not drink. Drug-driving is dealt with separately in law and covers some prescription and over-the-counter medicines as well as illegal drugs, so if you take regular medication, ask your doctor or pharmacist whether it affects driving.

The priority rules learners actually fail on

Observation at junctions is the number-one reason people fail the UK practical driving test, according to DVSA's published top-10 fail reasons — ahead of mirror use when changing direction, moving off safely and positioning when turning right at junctions. The priority rules in this article are not abstract law; they are the exact places where tests are lost. Four are worth drilling until they are reflexes:

• Emerging from junctions. Examiners test whether your observation is effective — looking left and right after you have already started to emerge counts as a fault, and forcing another driver to brake or swerve makes it a serious one.
• Roundabouts. Give priority to traffic approaching from your right unless signs, road markings or traffic lights tell you otherwise — and remember Rule H3: a cyclist travelling around the roundabout has priority over you entering or leaving it.
• Yellow box junctions. Do not enter the box unless your exit road is clear. The exception is turning right: you may enter the box and wait to turn right when you are only stopped from doing so by oncoming traffic, or by other vehicles waiting to turn right.
• Pedestrians at turns. Rule H2 again — a pedestrian crossing or waiting to cross the side road you are turning into has priority. Driving through that gap is precisely the kind of error examiners now mark.

There is no grading curve to hide behind, either. Our analysis of DVSA's latest tables puts the GB practical pass rate at 50.0% for 2025/26 — the highest figure in the recorded series, and still a coin flip (see our practical test pass rates data). To understand exactly how these errors are marked — and the line between a driving fault and an instant fail — read our guide to driving test faults.

How each rule turns into a theory test question

Every rule on this page is examinable in the 50-question multiple-choice theory test, where you need 43 correct answers to pass — and most candidates now fall short: the GB theory pass rate was 44.8% in 2025/26, down from 65.4% in 2007/08, according to our theory test pass rates analysis. The mappings are direct. Speed limits appear as recall questions — the national limit for a car on a single carriageway, including the Welsh 20 mph default. The phone law appears as exception-spotting: candidates who know the contactless-payment and 999 carve-outs pick the right answer instantly. Drink-drive questions test judgement — why no amount can be calculated as safe — rather than recital of microgram figures. And the hierarchy of road users has generated a whole family of questions about priority at junctions and crossings since 2022. Sharpen the sign-recognition part of the exam with our road signs test, and see our theory test tips for revising the Code systematically instead of cramming it the night before.

The fastest way to make these rules permanent is to be tested on them until the answers come without thinking. Drivings' free Highway Code test drills the exact rules on this page — the hierarchy, speed limits, the phone law, priorities — with an explanation behind every answer, and it sits alongside our full practice question bank and mock theory exams, so you can go from "read it once" to exam-ready without paying a penny.

Common questions about UK traffic rules

Is 20 mph the speed limit on every road in Wales?

No — 20 mph is Wales's default only on restricted roads, the street-lit roads through built-up areas. Councils can sign individual stretches back to 30 mph, and single carriageways (60 mph), dual carriageways and motorways (70 mph) carry the same limits as England and Scotland.

Can I touch my phone while stopped at a red light?

No — the law explicitly applies while you are stopped at traffic lights or queuing in traffic. The only stationary let-outs are being safely parked or making a contactless payment, for example at a drive-through.

Is one pint legal before driving?

There is no way to know, and that is the point: the limits are set in micrograms of breath and milligrams of blood, and how a pint translates depends on your weight, sex, metabolism and what you have eaten. Under Scotland's lower limit, one drink can be enough. Treat the limit as unreachable by design and do not drink before driving.

Are the Highway Code's advisory rules actually law?

Not in themselves — only MUST/MUST NOT rules are criminal offences. But advisory rules are admissible in court to establish liability, so breaking a "should" can still lose you a civil claim or support a careless-driving charge.

What is the hierarchy of road users in one sentence?

Those who can cause the greatest harm bear the greatest responsibility: drivers give way to pedestrians and cyclists in defined situations — most visibly to pedestrians crossing or waiting to cross a road the driver is turning into or out of.

Do cyclists have priority over cars?

In specific situations, yes: you should not cut across a cyclist going ahead when you turn or change lane, they have priority travelling around a roundabout, and giving way to them on a parallel crossing is a MUST. It is a set of defined priorities, not a blanket rule.

Does a 30 mph limit apply even when there are no signs?

Yes, on restricted roads: if a road has street lights and no repeater signs, the limit is 30 mph in England and Scotland — and 20 mph in Wales — unless signs tell you otherwise.

Can learner drivers use motorways?

Only in England, Scotland or Wales, only with an approved driving instructor, and only in a car fitted with dual controls — never with a parent or friend supervising. Full details in our guide to learner drivers on motorways.