Design of pedestrian-safety-island height based on traffic accident reconstruction

doi:10.3969/j.issn.1674-8484.2024.02.005

Abstract

Abstract:

A typical collision accident between vehicle and safety island was investigated, with reconstructed the accidents by utilizing PC-CRASH to investigate the protective effect of the height design of road traffic safety island on pedestrians and occupants in collision accidents. The influence of different vehicle collision speed and different safety island heights on the safety protection of pedestrians and occupants in the vehicle was analyzed with LS-DYNA based on the accident reconstruction. The results show that too low of the safety island height was the main cause of pedestrian casualties in the collision between vehicle and safety island. In the common speed range (30~50 km/h) of urban roads, the safety island designed with a height of more than 350 mm could effectively prevent the vehicle from driving on the safety island, so as to protect pedestrians. However, the 3-ms peak deceleration of the vehicle is much more than 72 g, which will lead to a high risk of head injury for the occupants of the vehicle. The future safety island design should consider the dual-protection of both pedestrians in the safety island and occupants in the vehicle. Therefore, it should be considered to design energy-absorbing buffer device around the safety island while raising the height of it, so as to better realize the safety protection of occupants in the vehicle through the dual-absorption of both the vehicle and the safety island.

Key words: road traffic safety, safety island height, safety protection, accident reconstruction, finite element simulation

CLC Number:

T416

ZHANG Chen, WEI Wei, CHEN Jiaxing, MA Zhengwei. Design of pedestrian-safety-island height based on traffic accident reconstruction[J]. Journal of Automotive Safety and Energy, 2024, 15(2): 178-187.

Figures/Tables 16

References 20

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整备质量	2.120 t	轴距	2.857 m
长度	4.807 m	前轮距	1.676 m
宽度	1.936 m	后轮距	1.679 m
高度	1.784 m

整备质量	2.120 t	轴距	2.857 m
长度	4.807 m	前轮距	1.676 m
宽度	1.936 m	后轮距	1.679 m
高度	1.784 m

半圆形安全岛半径	1.00 m
半圆形安全岛高度	170 mm
防撞柱数量	10根
防撞柱高度	1.00 m
防撞柱直径	140 mm

半圆形安全岛半径	1.00 m
半圆形安全岛高度	170 mm
防撞柱数量	10根
防撞柱高度	1.00 m
防撞柱直径	140 mm

车辆	整备质量/ t	长度/ m	宽度/ m	高度/ m	轴距/ m	前轮距/ m	后轮距/ m
事故车	2.120	4.807	1.936	1.784	2.857	1.676	1.679
模型车	2.244	4.819	1.839	1.767	2.848	1.553	1.573
差值 / %	+5.85	+0.25	-5.01	-0.95	-0.32	-7.34	-6.32