Advanced Safety Technology Evolution Its Traffic Accident Reduction Analysis(Third Report)

Hasegawa Takashi･Yukiko Sanda･Yukihiro Ikeda (Toyota Motor)

Using three years of ITARDA accident data, the accident rate of the third generation Toyota Safety Sense installed in Toyota and Lexus vehicles is calculated and compared to vehicles without the system. The results confirmed that overall fatal and injury accidents were reduced by half. In particular, there was a reduction of about 90% in rear-end collisions with other vehicles, as well as a reduction of about one-third in newly addressed straight-cross-path collisions.

Analysis on Crossing Collision in Stop Intersection by Utilizing Drive Recorder Video Images

Raksincharoensak Pongsathorn･Yoko Hojo･Xingguo Zhang･Masami Aga (Tokyo University of Agriculture and Technology)･Shotaro Yamasaki (Aioi Nissay Dowa Insurance)

The objective of this research is to analyze accidents involving four-wheeled vehicles at stop-and-go intersections based on 15-second video recorded by drive recorders towards the purpose of the development of a next-generation driver assistance system to prevent intersection accidents. In this presentation, the analysis of the conditions under which accidents occurred is conducted and described, as well as the analysis of speed patterns and driver reaction maneuvers when passing through intersections.

Behavior comparison between taxi drivers and ordinary drivers in car-to-car crossing collisions at non-signalized intersections

Masami Aga･Yoko Hojo･Raksincharoensak Pongsathorn (Tokyo University of Agriculture and Technology)･Yamasaki Shotaro (Aioi Nissay Dowa Insurance)･Nagai Masao (Tokyo University of Agriculture and Technology)

The drive recorder database of the Smart Mobility Research Center in Tokyo University of Agriculture and Technology is considered to be useful for safety assurance for autonomous vehicles. This database has been generated from taxi drivers’ drive recorder data. Therefore, in advance to commence the safety assurance study, we clarified whether taxi drivers in the database could be regarded as "competent and careful human" by comparing taxi drivers’ and ordinary drivers’ behaviors in their drive recorder data in car-to-car crossing collisions at non-signalized intersections as a specific example.

Investigation of deceleration support method by driver intervention to prevent encounter accidents on residential roads

Asuka Harada･Hitoshi Kanamori (Nagoya University)･Kenichi Yamada･Hayato Mizuma･Yasunobu Yokoi (Toyota Motor)･Yuki Yoshihara･Nihan Karatas･Takahiro Tanaka (Nagoya University)

Although communication-based driver assistance is expected to prevent accidents on residential roads, there remain concerns about dependence on and overconfidence in the system. First, the effectiveness and limitations of the alerting support for safe driving behavior guidance were identified. Next, we examined deceleration support by driver intervention as a countermeasure for drivers with inadequate deceleration behavior, and report on the speed of intervention decision making, the start and end of intervention, etc.

Evaluation of the effectiveness of a child crossing approach notification system using smartphones

Yokoi Yasunobu (Toyota Motor)･Kitahara Takeshi (KDDI Corporation)･Yasui Tomoko (Toyota Motor)･Kurosawa Kengo (KDDI Corporation)

It is known that accidents involving pedestrians and vehicles are particularly common due to children around the age of seven suddenly running into the street. To prevent these accidents, a system has been developed to notify drivers of the presence of children approaching crosswalks without traffic signals. This system transmits the location information obtained from devices carried by the children to the drivers' smartphones via a mobile phone network. With the cooperation of transportation companies and elementary schools, we evaluated the effectiveness of this system by comparing the speed of vehicles, the rate of stops, and the duration of stops at crosswalks when children are approaching, both with and without the use of the system.