2004•Nordic road & transport researchRequires access

Speed and road accidents : an evaluation of the power model

Rune Elvik, Peter Christensen, Astrid Helene Amundsen

Abstract

The relationship between speed and road safety is a highly controversial and emotionally charged subject. This report investigates the effects of changes in speed on the number of road accidents or road accident victims. It is found that the relationship between speed and accidents or accident victims can be represented by a set of power functions, as postulated in the so called Power Model of the relationship between speed and road safety.

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Key concepts: Transport engineering, Road accident, Road traffic, Accident (philosophy), Speed limit, Power (physics), Engineering, Traffic speed