This chapter covers motorcycle accident statistics and their causes. In examining the available statistics, there are inevitably difficulties with different definitions and classifications used in different countries. Global statistics for 'motorised two-wheelers' cover vehicles ranging from powerful motorcycles to motor-assisted pedal cycles. As far as possible the chapter concentrates on full size motorcycles, typically with engine sizes over 50cc. The first table gives numbers of motorcyclist fatalities in 1980 and 1990 in various countries, mostly in Western Europe but also including the USA, Japan, Australia and New Zealand. The second table gives motorcycle ownership, fatality rates, and comparisons with car fatality rates in 1980 and 1990 for the same countries. In each case, the statistics are for motorcycles and scooters combined, except where otherwise indicated. Then accident causes and configurations are discussed, including objects struck by motorcycles, speed, impact configuration, solo accidents, and accident factors. The distribution of injuries by body parts is tabulated, together with head injuries, leg injuries, and injuries to pillion passengers. Preventive injuries are considered briefly here and in more detail in later chapters.
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