The Traffic Signs Regulations and General Directions
The TSRGD 2002 supersedes and revokes the Traffic Signs regulations and General Directions 1994 and any subsequent amendments with a revised and consolidated TSRGD 2002. Adopted subsequently by Scottish Ministers, and the National Assembly of Wales.
TSRGD 2002 therefore prescribes the designs and conditions of use for roadstuds in the UK and is a statutory instrument which has the force of law.
TSRGD 2002 has two key directions in respect of roadstuds. Direction 57 specifies the products classifications and level of performance that are required for use in the UK. Direction 58 allows the secretary of state type approval in circumstances of use through a specified period only, or to determine possible requirements of Direction 57.
The following coding is taken from TSRGD 2002 direction 57. A product must meet these performance requirements to be legally used in the UK.
- P: Permanent roadstud
- T: Temporary roadstud
- A: Non depressible type
- B: Depressible type
- H 1,2,3: Dimension depressible of height above the road surface
- H 1,2: Dimension non depressible of height above the road surface
- HD 1: Dimension of exposed part after permanent installation
- HDT 1: Dimension of exposed part after temporary installation
- PRP1: Reflective performance as new (permanent)
- PRT 1: Reflective performance as new (temporary)
- NCR1: Colour of reflective light, any roadstud
- DCR1: Daytime visibility of temporary roadstuds
- S1: Number of roadstuds at close of road test
- R 1,2,3: Reflective performance on conclusion of road test
- DV1: Daytime visibility of temporary roadstuds at conclusion of road test