Choosing assets for improvement
Each year we survey a percentage of the highway network to measure its condition.
These surveys assess the highway surface condition against a range of criterias and maps the results on a RAG (Red, Amber, Green) map.
It is important to note that the surveys do not measure structural condition but make assumptions based on the failures measured on the surface. The output from the survey is reported to DFT as RCI (Road Condition Index) scores. These scores also measure our performance.
We also survey the highest risk area of the network for skid resistance. We assess the results against investigatory levels and make improvements to road grip.