Quick answer
For most cars in the UK, the national speed limit usually means 60 mph on a single carriageway and 70 mph on a dual carriageway or motorway.
It does not always mean the same speed. Vans, vehicles towing trailers and some other vehicle classes can have lower limits.
What the national speed limit means for cars
Single carriageway
Usually 60 mph for cars unless lower signs are shown.
Dual carriageway
Usually 70 mph for cars unless lower limits are posted.
Motorway
Usually 70 mph unless variable or reduced limits apply.
Always pay attention to road signs, roadworks and smart motorway gantries, as these can temporarily lower the legal limit.
What it means for vans and other vehicles
Many van drivers assume the national speed limit is the same as cars, but some vans have lower legal limits depending on their weight and classification.
- ✓Some vans have lower single carriageway limits
- ✓Some vans have lower dual carriageway limits
- ✓Towing can reduce limits further
- ✓Always check your specific vehicle rules
Common mistakes drivers make
- !Thinking the sign always means 60 mph
- !Forgetting road type changes the limit
- !Ignoring temporary roadwork signs
- !Assuming vans follow car limits
- !Missing variable motorway limits
Best driving tips
Use the road itself to help identify the likely limit. A single carriageway road usually has one lane each way, while a dual carriageway normally has a central divider.
If you are unsure, slow down and look for repeat signs. It is safer to drive below the limit than accidentally above it.
Remember that weather, traffic and visibility may require driving below the maximum legal speed.
Related guides
Frequently asked questions
Does the national speed limit sign always mean 70 mph?
No. It depends on the road type and the vehicle you are driving.
Can the limit be lower than national speed limit?
Yes. Local signs, roadworks and variable motorway limits override the standard national limit.
Do vans use the same limit as cars?
Not always. Many vans have different legal limits.
Can I be fined in a national speed limit zone?
Yes. If you exceed the legal limit for that road and vehicle type.