Abstract
Traffic accidents result in damage and a variety of casualty classes to the persons involved and all of these classes have to be accounted for when costing an accident. This aspect has been ignored in major valuation studies. This paper demonstrates the correct structuring of data to derive the costs of accidents for various severity levels and /or accident types. The typical casualty outcomes of a number of accident types are explored and the types producing the most severe results per accident are identified as are the types that produce the greatest contribution to the annual cost of accidents.