400 yards ahead to hazard
Countdown sign warning of a hazard (temporary or permanent) exactly 400 yards ahead. Slow down and stay alert – the hazard could be roadworks, an accident, flooding, or any other danger. The 400-yard warning gives you time to reduce speed safely and decide whether to change lanes or stop if necessary. In the theory test this sign often appears in hazard-perception clips to test whether you spot the hazard early and react appropriately.
- Shape
- Rectangular
- Background
- White
- Border
- Grey/Black
- Text type
- Number (Distance)
- Diagram reference
- 572.0
Where you'll see this sign
Any road where a temporary or permanent hazard exists ahead.
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.
