Speed limits in the UK are not always obvious. While most drivers know the 30 mph urban limit and the 70 mph motorway limit, the rules for single carriageways, dual carriageways, and different vehicle types can catch people out. Here is the complete guide.
National Speed Limits by Road Type
| Road Type | Cars & Motorcycles | Vans & Car-Derived Vans | Towing a Trailer |
|---|---|---|---|
| Built-up areas | 30 mph | 30 mph | 30 mph |
| Single carriageway | 60 mph | 50 mph | 50 mph |
| Dual carriageway | 70 mph | 60 mph | 60 mph |
| Motorway | 70 mph | 70 mph | 60 mph |
The “national speed limit” sign (white circle with a black diagonal stripe) means the speed limit shown in the table above applies. If a specific limit is posted (e.g. 40 mph, 50 mph), that limit overrides the national default.
20 mph Zones
20 mph zones have expanded significantly across UK cities in recent years. Wales introduced a default 20 mph limit on restricted roads in September 2023. In England, many local authorities have implemented 20 mph limits in residential areas and near schools.
20 mph limits are indicated by round signs with a red border and are legally enforceable. Some 20 mph zones also have physical traffic calming measures such as speed bumps and chicanes.
Variable Speed Limits
Variable speed limits are used on smart motorways and some managed stretches of dual carriageway. They are displayed on overhead gantries and change based on traffic conditions, incidents, or roadworks. Variable limits are legally enforceable — cameras on the gantries will catch you if you exceed the displayed limit.
Speed Limit Penalties
| Offence | Penalty |
|---|---|
| Minimum speeding penalty | £100 fine + 3 points |
| Speed awareness course (offered for minor offences) | ~£100 fee, no points |
| Court summons (serious speeding) | Up to £1,000 fine (or £2,500 on motorways) + 3–6 points or disqualification |
| Very serious speeding (e.g., 100+ mph) | Possible disqualification + unlimited fine in magistrates' court |
Speed Awareness Courses
If you are caught exceeding the speed limit by a small margin (typically up to 10% + 9 mph above the limit), you may be offered a speed awareness course instead of points. The course costs around £100, takes about 4 hours, and means you avoid points on your licence.
You can only accept a speed awareness course once every 3 years. If you are caught again within 3 years, you will receive points.
How Speed Cameras Work
The UK uses several types of speed camera:
- Gatso cameras — Rear-facing cameras that photograph your number plate. The most common fixed camera.
- Truvelo cameras — Front-facing cameras that photograph the driver
- SPECS cameras — Average speed cameras that measure your speed between two or more points. You cannot slow down just for the camera
- Mobile cameras — Operated by police officers from vehicles or handheld devices. Can appear anywhere
- Smart motorway cameras — Enforce variable speed limits displayed on gantries
Looking for your next car?
Browse verified used car listings on SortedCars.
Final Thoughts
Knowing the speed limits for every road type is a fundamental part of safe driving in the UK. The penalties for speeding are significant — not just the fine and points, but also the impact on your insurance premiums, which can increase substantially after a speeding conviction.
Frequently Asked Questions
Find Your Next Car on SortedCars
Browse verified listings and buy with confidence.