Traffic queues likely ahead

This warning sign means traffic queues are likely on the road ahead. Slow down, keep a safe gap and be ready to stop at the back of a queue, especially on a fast road where you could come over a crest or round a bend into stationary traffic.

Official Highway Code caption: “Traffic queues likely ahead.”

Listed under “Mostly triangular” in The Highway Code: traffic signs (GOV.UK). For every sign in more detail, see the Department for Transport’s Know your traffic signs.