Economic, Environmental and Social Impacts of Changes in Maintenance Spend on the Scottish Trunk Road Network


1. Further details on the trunk road network are available at

2. Accident causality data has been recorded since 2005.

3. Includes other activities such as traffic counts, Motorway telephones and compensation payments

4. Note that this is not the current standard UK RCI but an earlier version of the Index

5. The analysis used HDM-4 version 2.