VOLUME 8: TRAFFIC SIGNS AND LIGHTING

SECTION 2: TRAFFIC SIGNS AND ROAD MARKINGS
TD 26/17

Inspection and Maintenance of Road Markings and Road Studs on Motorways and All-Purpose Trunk Roads

SUMMARY:

This Requirement Document sets out the inspection and maintenance requirements for road markings and
road studs on motorways and all-purpose trunk roads. It supersedes TD 26/07.

Extracts from the Introduction to this standard.

“1.1 Road markings and studs make an essential contribution to road safety e.g. by clearly defining the path to be followed through hazards, by separating conflicting movements and by delineating the edge of carriageway on unlit roads at night. They can also help to improve junction capacity, and make best use of available road space.

1.2 For road markings to be effective they shall be clearly visible to road users, both day and night; their effectiveness depends on how well the marking stands out on the road (luminance) and the amount of light reflected back to the road user to make the marking visible (retro-reflectivity). For road studs to be effective they shall be clearly visible to road users during the hours of darkness; their effectiveness depends on the amount of light reflected back to the road user.”

Read the full standard HERE.