Abstract
Multiple injury cases are dealt with in road safety research by allocating a primary injury to casualties on the basis of the injury with the highest severity level. Subsequent analysis of the distribution and cost of road injury is then based on the classification of the primary injury. The purpose of this study was to explore the cost of road trauma involving single and multiple injury cases. The study examined the marginal cost of each additional injury sustained by casualties in road crashes. The work is currently in progress, and this paper presents some preliminary results.