Diagram 543 is used on approach to traffic light signals where the signals cannot easily be seen. This sign is used to allow the road user time to prepare to slow down for the signals and also to be aware of other road users slowing or stopping at the signals.
Material: R2/RA2 reflective overlay on aluminium composite backing
5.4.1. The ‘traffic signals ahead’ warning sign is shown in diagram 543 (S14‑2‑28, see Figure 5‑2). A plate to diagram 572, varied to include an arrow, is used where the signals are located along another road. When used on a dual carriageway road with two lanes or more in each direction, the signs may be duplicated on the central reservation.