Samenvatting
The development of effective road safety programs is dependent upon our knowledge of the various risk levels existing on the roads and highways. One of the major factors affecting road users' risk is the incidence of drivers' alcohol impairment levels. This paper extends earlier work and presents the results of multi-variate analyses. Detailed analyses of the level of drivers' BACs (blood alcohol concentrations) cross-classified by different driver-vehicle-environment-trip travel pattern characteristics are examined.