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This paper describes an analysis of a sample of over 300 fatally injured occupants of cars involved in accidents mainly between 1969 and 1976 in urban, rural and motorway environments of the United Kingdom. The sample is drawn from a retrospective field study of collisions conducted by examining cars at garages, and correlating that information with medical and road user data obtained from hospitals and by questionnaires. The sample is thought to be broadly representative of the U.K. occupant fatality situation. The injuries to all the fatally injured occupants are described in detail using the A.I.S. and the I.S.S. procedures. These injuries are then related to their most common sources, for specific crash configurations. The vehicle deformation is described in terms of the frequency and severity of various collision types, and then both injuries and deformation are reviewed in the light of existing and proposed safety legislation in Europe.

Some of the factors influencing the introduction of mandatory seatbelt use in Great Britain are outlined. The effectiveness of seatbelts is considered. Pre- and postlaw seatbelt use rates are described. The reductions in frontseat car occupant casualties following the introduction of the law are reported, and it is noted the actual reduction in fatalities is in line with the expected reduction. The results of the time series analyses of all road accident casualties are presented. These analyses indicate, with the data currently available, the changes in the numbers of other road users injured and killed cannot be attributed to the effects of the seatbelt legislation but are in line with normal seasonal and annual fluctuations. A brief review is made of studies relevant to the debate on risk compensation, and it is concluded that available evidence indicates that risk compensation probably does not occur when drivers are compelled to wear seatbelts.