Image not yet uploaded
Turn left ahead
A blue circle with a white arrow curving left. A mandatory instruction telling you that you must turn left at the junction ahead — going straight on or turning right is prohibited. Used at one-way system entrances, where right turns are banned to prevent congestion, and at junctions where traffic signals only allow a left turn from your lane.
- Shape
- Circular
- Background
- Blue
- Border
- White
- Primary symbol
- Arrow
- Diagram reference
- 606
Where you'll see this sign
Town-centre one-way systems, busy urban junctions where right turns would block oncoming traffic, and the entrances to roundabouts on certain approaches.
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.
