Minimum speed limit of 40 miles per hour
40 mph minimum speed limit – you must not go slower than 40 mph (unless conditions make it unsafe). This sign is common in long road tunnels. In the theory test it tests your understanding of minimum speed limits and the need to maintain speed. Always keep to at least 40 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
Long road tunnels.
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.
