Samenvatting
This report is the fruit of the survey and analysis on the motorcycle riders all over Thailand extending for two years from February 1983 to July 1985. The main purpose of the present analysis is to survey the number of riders per motorcycle and the ratio of riders wearing helmets.According to the surveyed data and analysis it becomes clear that motorcycles are the predominant transportation system Characters on the motorcycle riders such as average number of riders on a motorcycle, average helmet wearing ratio on the motorcycle riders and male, female, children ratio are clearly analyzed.