Quick answer
For most cars in the UK, standard limits are 30 mph on many built-up roads, 60 mph on single carriageways and 70 mph on dual carriageways and motorways unless signs show otherwise.
Always follow posted signs because local limits, roadworks, average speed zones and variable motorway limits can override standard limits.
Standard UK speed limits for cars
Built-up roads
Often 30 mph unless signs show a different limit such as 20 mph.
Single carriageways
Usually 60 mph for cars unless lower signs are displayed.
Dual carriageways / Motorways
Usually 70 mph for cars unless reduced by signs.
What the national speed limit sign means
The white circular sign with a black diagonal stripe means the national speed limit applies. It does not always mean 60 mph. The actual limit depends on road type and vehicle type.
- ✓Single carriageway cars: usually 60 mph
- ✓Dual carriageway cars: usually 70 mph
- ✓Different rules may apply for vans or towing
Van speed limits UK
Many van drivers assume limits match cars, but some vans have lower limits depending on classification and road type.
- ✓Single carriageways can be lower than cars
- ✓Dual carriageways can also differ
- ✓Always check the specific vehicle category
Smart motorway speed limits
Smart motorways may display variable speed limits using overhead gantries. These lower limits are legally enforceable when active and often help traffic flow or respond to incidents.
Speeding fines and penalty points
Speeding can lead to fines, points, awareness courses or prosecution depending on speed, location and previous offences.
- ✓Camera enforcement
- ✓Police roadside stops
- ✓Average speed camera zones
Common mistakes drivers make
- !Assuming the national speed limit always means 60 mph
- !Ignoring temporary roadwork limits
- !Not realising some vans have lower limits
- !Missing variable motorway signs
- !Speeding through average camera zones
Helpful UK speed limit guides
Frequently asked questions
Is every built-up road 30 mph?
No. Many are, but 20 mph zones are now common in some areas.
Does the national speed limit sign mean 70 mph?
Not always. It depends on road type and vehicle type.
Can cameras enforce temporary limits?
Yes, including average speed and motorway variable limits.
Do vans follow the same limits as cars?
Not always. Many vans have different limits.