To ask the Scottish Executive what the criteria are for siting new variable-message signs along the trunk road network.
Transport Scotland considers the following criteria for siting new variable message signs (VMS) along the trunk road network:
Distance from the junction (to allow decision making time for driver);
Road alignment and visibility of variable message sign messages;
Speed limit of the road;
Existing verge width;
Any nearby lay-by or other safe parking area that could be utilised for access for maintenance;
Availability of nearby power supply;
Existing services in verge;
Existing equipment locations to allow grouping of equipment and maintenance access where possible;
Visual backdrop in area (example trees or bridge) that might reduce negative visual impact of VMS;
Surrounding properties, and
Existing vehicle restraint systems (safety fences).