The contribution of traffic volumes, speed, congestion, road section block length, abutting land use and kerbside activity to accidents on urban arterial roads.

Urban arterials constitute only fifteen per cent of the road network in South African cities, yet sixty per cent of road accidents take place on them. One-third of the accidents occur between intersections, and this paper attempts to identify the environmental factors contributing to the accidents on the road sections. A small number of heavily trafficked arterials is safer than a larger number of more lightly trafficked arterials. Direct access to arterials should be restricted. One-way streets are safer than two-way streets.