Warning Sign/Reduce Speed Now

The reduce speed now sign (diagram 511) was introduced in 1964. Commonly used on roads with a high speed limit on the approach to such hazards as bends, roundabouts, and junctions, it consists of a red rectangle bearing the text REDUCE SPEED NOW in white, mounted below the warning sign indicating the nature of the particular hazard. It is sometimes accompanied by the word SLOW painted on the carriageway.

In Wales the sign additionally bears the text ARAFWCH NAWR (optionally with ARAF on the carriageway).