Minimum speed limit of 30 miles per hour
30 mph minimum speed limit – you must not go slower than 30 mph (unless conditions make it unsafe). This sign is common in tunnels and certain motorway slip roads. In the theory test it tests your understanding of minimum speed limits and the need to maintain speed. Always keep to at least 30 mph unless it is unsafe to do so.
- Shape
- Circular
- Background
- Blue
- Border
- White
- Text type
- Number (Other)
- Diagram reference
- 672.0
Where you'll see this sign
Tunnels and certain motorway slip roads.
Test yourself on UK road signs
How well do you really know your road signs? New Driver Hub's free mock theory test pulls from official-style DVSA questions and tells you which signs you keep getting wrong.
