Regulatory signs

No left turn for vehicular traffic

No left turn for vehicular traffic sign

What it means

You MUST NOT turn left here. It sits at the junction itself, so the ban applies to the very next left - often a one-way street running against you, or a turn too tight to make. Carry straight on and take the next left, or follow the signed route round the block.

Highway Code Rule 109 — read it on GOV.UK

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Other regulatory signs