Diagram 614 prohibits road users from making a U-turn manoeuvre due to the hazard it could pose to road users. The sign is often used at junctions or stretches of road that could pose a hazard when the slow manoeuvre is performed.
Material: R2/RA2 reflective overlay on aluminium composite backing
4.11.1. The “no U‑turn” sign to diagram 614 (S3‑2‑6, see Figure 4-34) is used to give effect to an order which may apply to a junction or a length of road. At junctions not controlled by signals, the sign should be mounted on the central refuge or reservation as close as practicable to the junction to face traffic approaching from the direction the prohibition applies to. Where there is no central island, the sign should normally be mounted on the left hand side of the road. However, where the sign might be obscured and to ensure that drivers are aware of the prohibition, the traffic authority should consider whether the sign should be sited or duplicated on the right hand side of the road. For signalled junctions see Chapter 6. Advance warning of the prohibition may be given on a sign to diagram 2010.1 or 2123 (S12‑28‑5 and 6 respectively, see Figure 4-13 and Figure 4-14), with the “no right turn” symbol varied to the “no U‑turn” symbol (S12‑20‑20).