AI Article Synopsis
- - This study analyzes how the collision avoidance performance of autonomous emergency braking (AEB) systems in Japan has changed since 2015, specifically focusing on their effectiveness in traffic accidents involving injury or loss of life.
- - Using data from Japan's National Police Agency and statistical regression analyses, the research compares AEB-equipped vehicles registered in 2015-2020 against non-AEB vehicles regarding their performance in preventing rear-end and right-turn collisions.
- - Results show a significant improvement in the collision reduction rate for rear-end collisions, with a 69.2% reduction for AEB cars registered in 2020 compared to non-AEB cars from 2015, while results for right-turn collisions are less consistent, suggesting ongoing advancements in
Article Abstract
Objective: This study quantifies the change in collision avoidance performance of autonomous emergency braking (AEB) systems for traffic accidents in Japan since 2015.
Method: This study used data on Japanese traffic accidents compiled by Japan's National Police Agency. The data included only accidents involving loss of or injury to human life; accidents involving only property damage were excluded. We restricted our analysis to collisions between two 4-wheel vehicles and considered only collisions for which we could determine whether the primary party's car was equipped with an AEB system. Both Poisson and negative binomial mixed-effects regression analyses were conducted using the data for 2021 and 2022 to measure the collision avoidance performance of first registered cars in 2015 to 2020 equipped with AEB systems compared with cars without AEB systems first registered in 2015. Collision avoidance performance was measured for 2 types of intervehicle collisions: rear-end collisions and right-turn collisions. Collision avoidance performance for rear-end collisions was also measured for each of the 3 car types-Standard, small, and light cars.
Results: The collision reduction rate for rear-end collisions increases with the year of first registration and for cars equipped with AEB systems first registered in 2020 compared with non-AEB-equipped cars first registered in 2015 is 69.2% (95% confidence interval [CI] 67.0%-71.1%), indicating that the performance of AEB systems has dramatically improved in terms of preventing rear-end collisions. For right-turn collisions, the rate increased to 20.4% (95% CI 5.9%-32.6%) for cars equipped with AEB systems first registered in 2019. However, no clear trend is observed.
Conclusions: This study evaluated a time series of the collision reduction performance of AEB systems using an original methodology. Japan's New Car Assessment Program (JNCAP) has included AEB's effectiveness in reducing damage from traffic collisions as an evaluation item since FY2014. The results could demonstrate the effectiveness of JNCAP.
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| http://dx.doi.org/10.1080/15389588.2024.2394975 | DOI Listing |
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