1998•Traffic Safety on Two ContinentsPTRC Education and Research Services LimitedRequires access
THE EFFECT OF HOURLY TRAFFIC VOLUMES ON TRAFFIC SAFETY..
Kirsti Pajunen
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Abstract
The aim of this study was to find out the effect of hourly traffic volumes on the number of traffic accidents and accident rates on different kinds of public roads in Finland. The question to answer was: Do accident rates decrease when traffic volumes increase? Hourly traffic volumes were collected from the automatic TMS (traffic monitoring station) of Finnra during the years 1991, 1992, and 1993. Annual accident data was collected from the accident register of Finnra. Accident rates on four different types of roads were determined. Two lane roads, four lane roads, motor traffic ways and motorways were all considered. Results suggest that accident rates decrease on two lane roads when traffic volumes increased. On motorways the accident rates remained about the same when traffic volume increased. For four lane roads and motor traffic ways the accident rates depended, in addition, on specific traffic volumes and hour of the day.