This study of single-carriageway trunk roads of modern design quantifies the relationships between the numbers of injury accidents that occur, and the traffic and road layout variables that determine them. The study covers 103 new schemes, opened since 1968, on non-built-up single-carriageway trunk roads in England. The techniques of generalised linear modelling were used to develop predictive relationships between numbers of accidents, traffic flow and geometric features of the road. The main results of this study refer to road links, that is, the stretches of road between junctions. The study was commissioned by the Traffic, Safety and Environment Division of Highways Agency and was undertaken by the Transport Research Laboratory. (A)

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