Relation between surface texture of roads and accidents
- Published: TRL, 1991
- Authors: P.G. Roe, D.C. Webster and G. West
- Date Added: 06 Mar 2013
- Last Update: 06 Mar 2013
To determine High-Speed Texture Meter (HSTM) measurements on a wide range of roads which have been used to relate texture depth directly to RTIs.
SCRIM and HSTM surveys were performed on a network of roads and then compared with the RTI records for those roads.
Both skidding and non-skidding RTIs, in both wet and dry conditions, are less if the macrotexture is course than if it is fine. This is observed at all levels of underlying skid resistance.
The texture level below which RTIs begin to increase is about 0.70 mm sensor measured texture depth.
All major types of surfacing contribute texture depths across the practical range.
Macrotexture has similar influence on RTIs if they occur near hazards such as junctions or elsewhere.
The study notes that further research is required to confirm the hypothesis that improving texture reduces RTIs – research since this report was produced, would suggest that this hypothesis has been confirmed.
Texture, RTI reduction
UK content but could be out of date now.