Travelling speed and the risk of crash involvement. Volume 1: findings.

Kloeden, C.N. McLean, A.J. Moore, V.M. & Ponte, G.

The relationship between free travelling speed and the risk of involvement in a casualty crash in a 60 km/h speed limit zone was quantified using a case control study design. The 151 case vehicles were passenger cars involved in crashes in the Adelaide metropolitan area which were investigated at the scene by the NHMRC Road Accident Research Unit at Adelaide University and reconstructed using the latest computer aided crash reconstruction techniques. The 604 control vehicles were passenger cars matched to the cases by location, direction of travel, time of day, and day of week and their speeds were measured with a laser speed gun. It was found that the risk of involvement in a casualty crash doubled with each 5 km/h increase in free travelling speed above 60 km/h. Hypothetical speed reductions applied to the case vehicles indicated large potential safety benefits from even small reductions in travelling speed, particularly on arterial roads. (A)

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C 15720 [electronic version only] /83 / IRRD 895314

Canberra, ACT, Federal Office of Road Safety FORS, 1997, V + 60 p., 64 ref.; Report No. CR 172 - ISSN 0810-770X / ISBN 0-642-25590-3

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