About
Circular Road Signs
Circular road signs do one of two things: they either prohibit road users from doing something, or they issue a positive instruction. Prohibitive signs typically have a red border, while positive instruction signs are usually blue (but this is not exclusively the case).
Speed limit signs are some of the most common circular signs on UK roads, along with the instantly-recognisable "No Entry" signs. Other prohibitive signs include "No Waiting", "No Stopping", and those denying entry to specific vehicles.
Drivers will also be familiar with the blue circular "Keep Left/Right" and "Roundabout Ahead" signs, alongside those denoting cycle routes or specifying which types of vehicles are permitted into a certain area.
This category also includes circular symbols on square or rectangular signs, which often occurs with temporary road signs, speed limit "zones", and advisory speed limits.