This study attempts to provide a method for measuring vehicle trajectories from a drive video recorder movie and to evaluate the accuracy of such measurements. The proposed method can measure the trajectory using the movie and some information concerning the focal length of the drive video recorder, and camera installation conditions (height from the ground and angle from the horizontal plane). This method can measure trajectories of twenty meters with good accuracy.

View full abstract

The purpose of this study is to investigate the performance of currently available protective headwear.Eight varieties of protective headwear that can be worn comfortably by pedestrians were tested. The Hybrid Ⅲ dummy was dropped onto the ground from approximately 900mm of wearing each variety of protective headwear. From the results of experiments, the HIC value was less than 1000 for only one variety of headwear, suggesting that the high performance of available protective headwear effectively protects against serious trauma at the secondary collision in car-pedestrian accidents. However, it is necessary to develop higher performance headwear to further reduce injuries.

View full abstract

[in Japanese]

View full abstract

[in Japanese]

View full abstract