Paragraph 30 Signs to be placed only at specified sites or for specified purposes
The sign shown in diagram 957 may be placed on a road only when the road has been divided into a part reserved for the use of pedal cycles only and a part reserved for use by pedestrians only by either or both of the following means—
(a)
the road marking shown in diagram 1049 (when that marking is varied to be 150 millimetres wide) or 1049.1;
(b)
the presence on the road of works such as distinctive colouring of the surface of each part, a kerb or other device.