This study will describe the injury frequency and injuries in detail for motorcycle drivers on German roads involved in traffic accidents and comparing the analysis with the whole group of all kinds of motorized two-wheelers.The study is based on accident sampling by GIDAS (German In-Depth-Accident Study).The current situation on injury frequencies on different body areas and the severity of such injuries are well documented and compared to previous time frames.Also the characteristics of the accident causes are analyzed on the basis of a special coding system ACAS (Accident Causation Analysis System) showing human factors responsible for the accident occurrence.For the present study 3.083 accidents with 3.144 motorized two wheeler riders are given as representative distribution for the German situation, based on a statistical random selection of accident documentations and weighting procedure.Two-thirds of all motorized two-wheeler suffered from minor injuries MAIS 1 and 10% received severe injuries MAIS 3+.The trend of the last decades is shown a positive decrease of numbers in fatalities and severely injured riders.Nearly 50% of the riders used protective clothes while 98% wear helmets.The impact location and load levels are discussed regarding an optimization of the safety level on the motorcycle and demands to the rider on protective equipment.Over 70% of the riders had contributed to the emergence of the accident with a human failure and in less than 2% of the cases a technical defect of the motorcycle was a contributing factor for causing the accident.Over 10% of the motorcycle riders had caused an accident due to an influence from the traffic environment or weather.This study will show that also demands to the drivers of motorcycles are needed to get further reduction in accident events.