Abstract
Intelligent speed adaptation (ISA) which has been attracted in European countries has the possibility to be a drastic tool for traffic calming in Japan. This study at first developed the speed selection model considering both the safety and convenience, and then the model was estimated using the data from the driving experiment. Next, the drivers' burdens and the benefit of death accident reduction were calculated and compared based on the speed selection model and the crash risk evaluation model where the virtual community street segments were assumed. It was then found that the benefit of introducing mandatory ISA with the 30km/h limit surpassed the burdens when more than one dart-out pedestrian accident had averagely been occurred per one kilometer per two years in the current situation.
