Analysis of vulnerable road user kinematics before/during/after vehicle collisions based on video records

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Han, Yong¹; Li, Quan¹; He, Wei¹; Wan, Fang¹; Wang, Bingyu¹; Mizuno, Koji²

Analysis of vulnerable road user kinematics before/during/after vehicle collisions based on video records

Proceedings of the 2017 International IRCOBI Conference on the Biomechanics of Injury

Affiliations

¹Xiamen University of Technology, China

²Department of Mechanical Systems Engineering at Nagoya University, Japan
Abstract and keywords

The vulnerable road users (VRUs) tend to sustain serious injuries in accidents. There are various types of accident scenarios, and VRUs show various behaviors before and after impacts. In this paper, we analyzed 400 VRU accident cases (200 pedestrians and 200 two‐wheelers) with video information. The VRUs before/during/after collision parameters (e.g., accident scenarios, VRU avoidance motion, kinematics and trajectory during vehicle impact, and ground contact) were examined. The emergency avoidance motions of the VRUs before collision were: jumping, hands up to prevent, and others. 66% of the pedestrians and 53.5% of the two‐wheelers showed avoidance motions before collisions. Pedestrians typically have higher rotation angles than riders on two‐wheelers during vehicle collisions, and two‐wheeler's riders’ kinematics are more complicated especially when caused by the side impact. Pedestrian rotation angles greater than 90 degrees were observed in over 45% pedestrian collisions. The kinematics of the pedestrian and two‐wheelers depends on the vehicle front‐end shape and impact velocity. In the ground impact, the order of VRU body regions making contact against the ground depends on the landing posture. The analysis of VRUs before/during/after collisions using accident videos would be useful for comprehensive understanding of VRU accidents.

Keywords: Vulnerable road user, pedestrian accident, two‐wheelers accident, Kinematics, Ground impact
Links

URL: http://www.ircobi.org/wordpress/downloads/irc17/pdf-files/26.pdf

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Cited By (9)

Year	Entry
2019	Zhao Y, Ito D, Mizuno K, Kong C. AEB effective evaluations by accident reconstructions using videos of drive recorders in perpendicular and turning car-to-cyclist collisions. In: Proceedings of the 2019 International IRCOBI Conference on the Biomechanics of Injury. September 11-13, 2019; Florence, Italy.243-255.
2020	Schachner M, Schneider B, Sinz W, Klug C. Extracting quantitative descriptions of pedestrian pre-crash postures from real-world accident videos. In: Proceedings of the 2020 International IRCOBI Conference on the Biomechanics of Injury. 2020; Munich, Germany.231-249.
2024	Campolettano ET, Scanlon JM, Kusano KD. Characterising vulnerable road user evasive manoeuvring in real-world crashes: injury risk implications. In: Proceedings of the 2024 International IRCOBI Conference on the Biomechanics of Injury. September 11-13, 2024; Stockholm, Sweden.899-910.
2020	Jin Q, Pan D, Huang H, Han Y. Analysis of the causation mechanism of vehicle-to-electrical two-wheeler accidents based on video footage of real-world collisions. In: Proceedings of the 2020 International IRCOBI Asia Conference on the Biomechanics of Injury. 2020; Beijing, China.13-16.
2020	Pan D, Han Y, Jin Q, Huang H. A preliminary analysis of vehicle-to-powered two-wheeler accident scenarios based on the VRU-TRAVi database. In: Proceedings of the 2020 International IRCOBI Asia Conference on the Biomechanics of Injury. 2020; Beijing, China.17-20.
2022	Pujari AS. Vulnerable Road User Head Impact Evaluation for Bus Front Ends Using Finite Element Model [Master's thesis]. Götenburg, Sweden: Chalmers University of Technology; 2022.
2020	Shang S. Pedestrian Whole Body Ground Contact Mechanisms and Head Injury Assessment Following Vehicle Impact [PhD thesis]. Trinity College Dublin; April 2020.
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2023	Halari MM. The Significance of Injuries and Anatomical Patterns of Trauma in Pedestrian and Cyclist Fatalities and Their Association With Motor Vehicle Collision Dynamics and Post-Collision Kinematics [PhD thesis]. University of Western Ontario; 2023.