Warning sign
One Lane Road Ahead Sign
The road narrows to a single lane shared by both directions, typically at a bridge or through a cutting.
What to do
Slow down and be ready to give way. Only enter when you can see the whole one-lane section is clear.
- Shape
- Diamond
- Colours
- Yellow with a black symbol and border
- Category
- Warning sign
Warning signs are yellow diamonds. They tell you what the road is about to do, early enough to change speed.
Common questions
What does the one lane road ahead sign mean?
The road narrows to a single lane shared by both directions, typically at a bridge or through a cutting.
What should you do at a one lane road ahead sign?
Slow down and be ready to give way. Only enter when you can see the whole one-lane section is clear.
What shape and colour is the one lane road ahead sign?
Diamond. Yellow with a black symbol and border.