THE EXTERIOR COLLISION

PEDESTRIAN, BICYCLE, AND MOTORCYCLE ACCIDENTS ARE DISCUSSED. PEDESTRAIN ACCIDENTS ARE ESSENTIALLY AN URBAN PROBLEM, WITH MARKED DIFFERENCES BETWEEN ADULTS AND CHILDREN BOTH IN COLLISION CIRCUMSTANCES AND INJURIES. CYCLISTS INVOLVED IN ACCIDENTS ARE MAINLY MALE TENNAGERS AND ARE THE LEAST SEVERLY INJURED OF THE ROAD USERS CONSIDERED. MOTORCYCLISTS SHOW DIFFERENT ACCIDENT CHARACTERISTICS ACCORDING TO THE ENVIRONMENT OF THE COLLISION. URBAN COLLISIONS INVOLVE MANY SIDE IMPACTS AND LEG INJURIES, WHILE RURAL COLLISIONS ARE EITHER HEAD ON OR REAR END ONES. MOTORCYCLE RIDERS ARE ALMOST ALWAYS YOUNG MALES, BUT HALF OF THEIR PASSENGERS ARE FEMALE. HELMET USE IS DISCUSSED, AND THE EFFECT OF ENGINE SIZE ON ACCIDENT CHARACTERISTICS IS OUTLNED. /HSL/