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How to improve the AV safety: From the understanding of AV crashes to safety enhancement strategy

Author

Listed:
  • Wu, Yao
  • Luo, Yuanwei
  • Liu, Yupeng
  • Lin, Yi
  • Guo, Yanyong

Abstract

Autonomous vehicles (AVs) are increasingly prioritized in national transport strategies for their potential to improve safety and sustainability. Yet real-world crashes show that AVs remain vulnerable to safety risks, highlighting the need to understand their crash patterns and develop evidence-based countermeasures. The objective of this study is to investigate the factors associated with AV crashes and develop safety countermeasure to improve AV safety. 335 AV crash data from 2021 to 2022 was collected from collision reports from San Francisco at Traffic Analysis Zones (TAZ) level. Sociodemographic, built environment, land-use, and exposure variables were incorporated into Ordinary Least Squares (OLS) and Geographically Weighted Regression (GWR) models. Compared with OLS, the GWR model provides a superior fit, as reflected by its lower AIC (535.17) and residual sum of squares (580.66). Model results revealed diverse effects of build environment on AV crashes across TAZs. Specifically, bus stop and transit lane densities exhibit strong negative associations with crash frequency, particularly in the southwestern regions. Bicycle parking density is negatively correlated with crashes. In contrast, wider sidewalks and higher proportions of speed limit zones are positively associated with AV crashes in certain urban areas. The impact of traffic signal density is spatially inconsistent—showing a crash-reducing effect in northeastern urban areas but a positive association in southwestern regions. Safety countermeasures were proposed from the perspective of understanding the AV crash influencing factors. The study underscores the significance of well-planned transportation facilities in enhancing AV safety.

Suggested Citation

  • Wu, Yao & Luo, Yuanwei & Liu, Yupeng & Lin, Yi & Guo, Yanyong, 2026. "How to improve the AV safety: From the understanding of AV crashes to safety enhancement strategy," Transportation Research Part A: Policy and Practice, Elsevier, vol. 205(C).
    • Handle: RePEc:eee:transa:v:205:y:2026:i:c:s0965856426000212
    DOI: 10.1016/j.tra.2026.104880
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    References listed on IDEAS

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    1. Luo, Lichen & Parady, Giancarlos & Takami, Kiyoshi, 2024. "Evaluating the impact of automated vehicles on residential location distribution using activity-based accessibility: A case study of Japanese regional areas," Transportation Research Part A: Policy and Practice, Elsevier, vol. 190(C).
    2. Mohamed Abdel-Aty & Shengxuan Ding, 2024. "A matched case-control analysis of autonomous vs human-driven vehicle accidents," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    3. Hymel, Kent, 2009. "Does traffic congestion reduce employment growth?," Journal of Urban Economics, Elsevier, vol. 65(2), pages 127-135, March.
    4. Lee, Dasom & Hess, David J., 2020. "Regulations for on-road testing of connected and automated vehicles: Assessing the potential for global safety harmonization," Transportation Research Part A: Policy and Practice, Elsevier, vol. 136(C), pages 85-98.
    5. Zhichun Li & Wenjing Liu & André de Palma & Yuki Takayama & Takao Dantsuji, 2025. "Autonomous vehicles, urban deployment, and welfare effects," Working Papers hal-05588995, HAL.
    6. Shladover, Steven E. & Nowakowski, Christopher, 2019. "Regulatory challenges for road vehicle automation: Lessons from the California experience," Transportation Research Part A: Policy and Practice, Elsevier, vol. 122(C), pages 125-133.
    7. Yonah Freemark & Anne Hudson & Jinhua Zhao, 2019. "Are Cities Prepared for Autonomous Vehicles?," Journal of the American Planning Association, Taylor & Francis Journals, vol. 85(2), pages 133-151, April.
    8. Huang, Yuan & Wang, Xiaoguang & Patton, David, 2018. "Examining spatial relationships between crashes and the built environment: A geographically weighted regression approach," Journal of Transport Geography, Elsevier, vol. 69(C), pages 221-233.
    9. Feng, Xuan & Jia, Ning & Su, Xiaohan & Adams, Matthew D. & Deng, Yongqi & Ling, Shuai, 2025. "Assessing the applicability of the 15-minute city: Insights from a spatial accessibility perspective," Transportation Research Part A: Policy and Practice, Elsevier, vol. 199(C).
    10. Ye, Lanhang & Yamamoto, Toshiyuki, 2019. "Evaluating the impact of connected and autonomous vehicles on traffic safety," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 526(C).
    11. Li, Shunxi & Sui, Pang-Chieh & Xiao, Jinsheng & Chahine, Richard, 2019. "Policy formulation for highly automated vehicles: Emerging importance, research frontiers and insights," Transportation Research Part A: Policy and Practice, Elsevier, vol. 124(C), pages 573-586.
    12. Mordue, Greig & Yeung, Anders & Wu, Fan, 2020. "The looming challenges of regulating high level autonomous vehicles," Transportation Research Part A: Policy and Practice, Elsevier, vol. 132(C), pages 174-187.
    13. Wang, Zhiqi & Zhang, Yufeng & Jia, Bin & Gao, Ziyou, 2024. "Comparative Analysis of Usage Patterns and Underlying Determinants for Ride-hailing and Traditional Taxi Services: A Chicago Case Study," Transportation Research Part A: Policy and Practice, Elsevier, vol. 179(C).
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