PRACTICE NOTES
Traffic signs and road markings in Great Britain: statutory definitions, authority powers and duties, unauthorised signage offences, and central government control under TSRGD 2016 and DfT guidance
Definitions
Section 64(1) of the Road Traffic Regulation Act 1984 (RTRA 1984) defines a traffic sign as any object or device, whether fixed or portable, used to convey to traffic on roads, or to any specified class of traffic, warnings, information, requirements, restrictions or prohibitions of any kind, either (a) specified by regulations made by the relevant authority or (b) authorised by the relevant authority; it also covers any line or mark on a road employed for conveying such warnings, information, requirements, restrictions or prohibitions.
The definition therefore spans the sign types familiar to road users, namely:
warning signs (typically triangular with a red border)
mandatory prohibition signs (typically circular with a red border)
mandatory signs (typically circular and blue)
information signs (typically rectangular)
This last group includes direction signs, place name signs and street name signs, and also road surface lines: yellow (and occasionally red) for parking restrictions, with white used for most other purposes.
Powers and duties
For a local traffic authority, placing signs on highways is usually lawful and often a requirement...
Local Government