Prospective assessment of the effectiveness of autonomous emergency braking in car-to-cyclist accidents in France

Chajmowicz, Henri; Saadé, Jacques; Cuny, Sophie

doi:10.1080/15389588.2019.1679797

Cited by 23 publications

(9 citation statements)

References 5 publications

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“…The AEB algorithms with large TTC and deceleration activate the brake earlier and come to a full stop faster, achieving a higher crash avoidance rate. Existing research ( 17 , 42 ) has also found that large TTC and deceleration improve crash avoidance and decrease injury severity. Figure 7, however, shows that algorithms that have a high crash avoidance rate also have a large stop distance, which represents inefficient use of road resources.…”

Section: Discussionmentioning

confidence: 97%

Evaluation of Automatic Emergency Braking Systems in Two-Wheeler Crash Scenarios

Zhou

Wang

2023

Transportation Research Record: Journal of the Transportation R

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The two-wheeler (TW) is a popular means of transportation in China, but TWs often suffer from serious traffic crashes because of their highly flexible trajectory and low detectability. Therefore, they present a challenge for the sensing and decision-making systems in autonomous vehicles (AVs). Collision avoidance systems, such as automatic emergency braking (AEB), have provided an effective way for AVs to avoid collisions with different objects, including TWs. The effectiveness of the AEB system is highly dependent on its parameter configurations, however, which vary among TW crash scenarios. This study, therefore, evaluates the AEB parameters, including time to collision (TTC), deceleration, and detection area (including detection range, field of vision, and trigger width) in two AEB systems: one-stage AEB and three-stage AEB. A total of 243 crashes extracted from the China In-Depth Accident Study database were simulated in Matlab’s Simulink. Results show: (i) one-stage AEB crash avoidance rates range from 15.2% to 81.5%, while three-stage AEB has crash avoidance rates as high as 87.2%; (ii) deceleration, TTC, and detection area all have significant main effects on crash rate, but detection area has less influence in longitudinal than in crossing scenarios; (iii) higher crash avoidance rates resulted in lower traffic efficiency for both AEB systems, but resulted in greater speed reduction only for one-stage AEB; and (iv) collisions are less likely to be avoided in scenarios with high initial speed of TW and AV. This study demonstrates the performance of AEB algorithms in multiple actual crash scenarios and provides a reliable basis for the development of AEB systems.

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Section: Discussionmentioning

confidence: 97%

Evaluation of Automatic Emergency Braking Systems in Two-Wheeler Crash Scenarios

Zhou

Wang

2023

Transportation Research Record: Journal of the Transportation R

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“…The effect of lateral trigger width on AEB performance was also investigated by setting W to 2, 3, and 5 m, 4,19,20,28 where SDT was set to the common 0.2 s to facilitate analysis of the results.…”

Section: Methodsmentioning

confidence: 99%

Comparative analysis of AEB effectiveness based on typical and atypical scenarios of electric two-wheeler accidents in China

Pan

Han

Jin

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Electric two-wheeler (ETW) accidents are one of the most important types of traffic accidents in China. Currently, the China New Car Assessment Program (C-NCAP) has proposed test scenarios to evaluate the effectiveness of autonomous emergency braking (AEB) for ETWs, including several common typical crash scenarios, but other atypical scenarios have not been considered. To determine the performance of AEB in real accidents, 16 in-depth accident cases with typical scenarios and 11 cases with atypical scenarios were selected based on a proposed C-NCAP typical scenario set and reconstructed using the virtual simulation tools MADYMO and PC-Crash. The crashes were re-simulated with a car equipped with an AEB system while varying the sensor field of view (FOV), time-to-collision (TTC), sensor delay time (SDT), and lateral trigger width ( W). The results show that for almost all combinations of AEB parameters, the crash avoidance rate was much higher in the typical scenario than that in the atypical scenario. When using an AEB with a FOV of 90° (±45°), all ETW accidents were avoided in typical scenarios, while even with the most efficient AEB system (FOV = ±60°, TTC trigger value = 1.5 s, SDT = 0.1 s), only 82% of crashes were avoided in atypical scenarios. Further considering the effect of lateral width, increasing the width from 2 to 5 m, the maximum avoidance rate of the AEB system increased by 43% in the typical scenarios and 18% in the atypical scenarios. The findings suggest that the typical AEB test scenarios proposed for C-NCAP were useful for other crash scenarios, but that including additional test scenarios may better reflect real world crash scenarios. It is recommended that atypical scenarios should be considered in C-NCAP, particularly perpendicular crash scenarios with the car or ETW turning, to better describe real accidents and improve vehicle safety.

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“…2016); (Bastos et al,2015); (Mooren et al,2014); (Albalate & Yarygina, 2013); (Cafiso & D'Agostino, 2016); (Horswill et al, 2011); (Vankov & Schroeter, 2021) ; (Islam et al, 2021); (Tarasi et al, 2021); (Osei et al,. 2021); (Lu et al, 2019); (Chajmowicz & Cuny, 2019); (Oviedo-Trespalacios et al, 2016); (Yadav & Velaga, 2020); (AlRukaibi et al, 2021); (Marciano et al, 2015). Process measures (De Bartolomeo et al, 2023); (El-Sayed et al, 2021); (Papadimitriou & Yannis, 2013); (Behnood, 2018); (Chapelon & Lassarre, 2010); (Fwa, 2017); (Chen et al,.…”

Section: Identification Of Main Road Safety Measures Usedmentioning

confidence: 99%

Road Safety Performance Monitoring Practices: A Literature Review

EL KHALAI,

CHORFI,

BERRADO

2023

EPSTEM

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Road traffic crashes remain a major concern worldwide. They are considered by the World Health Organization as one of the leading causes of death worldwide. To address this road insecurity, many countries are developing national strategies and trying to put in place the necessary action plans for their implementation. At this stage, monitoring of performance is crucial to ensure the efficacy of these road safety systems. The primary objective of this study is to examine the state-of-the-art practices employed in researches for managing road safety systems, specifically performance monitoring, and present the results in an engaging and informative manner. Through a comprehensive review of existing literature, the study seeks to identify essential components to help policymakers develop and monitor the performance of their road safety systems. The findings of this study can serve as a foundation for decision-makers in their efforts to develop and manage effective road safety systems.

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Prospective assessment of the effectiveness of autonomous emergency braking in car-to-cyclist accidents in France

Cited by 23 publications

References 5 publications

Evaluation of Automatic Emergency Braking Systems in Two-Wheeler Crash Scenarios

Evaluation of Automatic Emergency Braking Systems in Two-Wheeler Crash Scenarios

Comparative analysis of AEB effectiveness based on typical and atypical scenarios of electric two-wheeler accidents in China

Road Safety Performance Monitoring Practices: A Literature Review

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