For some years it has been suspected that new asphalt surfacings may have different skid resistance properties to surface have been in service for some time. This is thought to be due to the presence of a film of bitumen binder on the new surface that is eventualy removed by by weathering and traffic. New types of surfacing introduced in the mid 1990s have led to concerns that the risk of early-life skid resistance problems, and the time that any effects last, may have increased. Research has identified physical phenomena that might lead to an increase in accident risk in some circumstances. This report provides the results of a study to investigate if a link could be observed between new surfacings and accident risk. The study used a combination a combination of an analysis of accidents before and after resurfacing on the highways agency (HA) network, and collation and review of anecdotal comment from the HA's Area teams and Maintaining agents, and from other Highway Authorities. The findings from this study are generally consistent with the physical phenomena that have been measured on new asphalt surfacings. Neither of the approaches used in the study identified widespread problems with modern asphalt surfacings in their early life but there is evidence of a small increased accident risk in some circumstances.

LOKASI: Rak Penelitian 2