Road studs in mandatory markings should be replaced when 25% or more are missing on straight roads and 10% or more on bends. Work should be carried out within three months of report and should be replaced within seven days of report.

During resurfacing, road markings erased boards are to be displayed until the full markings have been replaced.  Stop and give way markings are to be replaced within seven days, other mandatory lines to be marked or replaced within 14 days of completion of surfacing.  Other markings and road studs are to be replaced within 28 days of completion of surfacing.

Primary and main distributor roads are to be driven at night during the autumn period and defective or missing road studs are to be replaced as part of an annual programme.  At least 90% of road studs are to be reflective prior to the winter period.

On secondary distributor, link and local access roads, new studs will not be provided but existing road studs will be maintained to the above standards and replaced following R&R schemes.