Speed limits state the maximum speed permitted on a given road. The speed limit is displayed at the beginning of the section of road, inside a circular sign. Carriageway roundels are hardwearing markings that indicate the speed limit on the carriageway. The marking is varied to show the speed limit in force and elongated in the direction of travel to compensate for the foreshortening effect.
Carriageway roundels can’t be:
- used as a repeater in a street lit area
Carriageway roundels can be:
- used as a repeater for 40 and 50mph speed limits and 30mph speed limits that are not restricted by a system of street lighting
- co-located with a terminal sign at the start of a speed limit.
Carriageway roundels cost approximately £200 dependent on size and speed limit.
All costs stated are for guidance only.
Figures provided are estimates and are reviewed annually, with all costs subject to a site survey assessment.
For further guidance see the Department for Transport: Local Transport Note on Traffic calming