Allocating the costs of motor vehicle crashes between vehicle types

When a truck and an automobile are involved in a crash, the harm to occupants tends to vary with the weight of the vehicles involved. In determining the appropriate level of government expenditures for traffic safety, costs in multivehicle crashes involving different vehicle types must be allocated between occupants and nonoccupants of a particular vehicle type. Four methods for allocating costs among different vehicle types are considered, corresponding to different perspectives, including that of occupants of a vehicle and that of society under different property right assignments. Costs based on the four allocation methods for the United States as a whole and per vehicle mile are also estimated. The allocation method was found to have large effects on the relative magnitude of costs.