Accidents at urban priority crossroads and staggered junctions

The report gives the findings of a study of accident risk based on a national stratified sample of 300 urban priority crossroads and staggered junctions on single carriageway roads (2917 personal injury accidents). The study includes crossroads with and without pedestrian crossings on roads with 30 mph or 40 mph speed limits. Tabulations are given showing accident frequencies, severities and rates by road type and region. The accidents are also tabulated by accident group, road user involvement and number of casualties per accident. The main objective of the study was to develop relationships between accident frequency and traffic flow, road features, layout, geometry, land use and other variables. The technique of generalised linear modelling was used to develop such relationships for different types of accidents.