ASSESSING THE VALIDITY OF ROAD SAFETY EVALUATION STUDIES BY ANALYSING CAUSAL CHAINS

The objective of this paper is to show how it is possible to assess the validity of road safety evaluation by analyzing causal chains. Two case illustrations are provided to illustrate this possibility. The main research problem addressed in the paper is: how is it possible to assess the validity of road safety evaluation studies by analyzing causal chains that generate the effects of a road safety measure on accidents or injuries? The main conclusions to be drawn based on the two case studies can be summarizes as follows: A road safety measure affects accidents or severity of injuries by way of causal chain which consists of one or more risk factors that the measure is intended to affect favorably; a good road safety evaluation study explicitly models and collects data about the causal chain by which the measure is hypothesized to be effective; the conclusion from the case studies is that the most important threat to validity of road safety evaluation studies is lack of control of confounding variables.

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  • Corporate Authors:

    Elsevier

    The Boulevard, Langford Lane
    Kidlington, Oxford  United Kingdom  OX5 1GB
  • Authors:
    • Elvik, R
  • Publication Date: 2003

Language

  • English

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Filing Info

  • Accession Number: 00962966
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 8 2003 12:00AM