Event

Most welcome to Bo Sui’s licentiate seminar "Car crashes with two-wheelers in China: Proposal and assessment of C-NCAP automated emergency braking test scenarios"!
Bo is an industry PhD student from Autoliv at the Division of Vehicle Safety at the Department of Mechanics and Maritime Sciences at Chalmers. Discussion leader will be Ulrich Sander, Senior Principal Researcher – Data Analysis, VEONEER.

Abstract
In  China,  around  15,000  users  of  two-wheelers  (TWs)  die  on  the  road  every  year. Passenger  cars  are  the  dominating  crash  opponent  of  TWs in  road  traffic  crashes. Understanding  the  characteristics  of  car  crashes  with TWs  is  essential  to  enhance cars’ safety performance and improve the safety of TW riders in China. This  thesis  has  three  objectives.  First,  to  define  test  scenarios  of  Automated Emergency Braking systems for cars encountering TWs (TW-AEB) in China (Paper I). Second,  to  assess  whether  cars  with  good  ratings  in  consumer  safety  rating programs (e.g., New Car Assessment Program: NCAP) are also likely to perform well in the real-world. Finally, to understand the characteristics of the car crashes with TWs after the TW-AEB application. To  achieve  the first  objective,  cluster  analysis  was  applied  to  the  China  In-Depth Accident  Study  (CIDAS).  The  results  were  six  test  scenarios  (Paper  I),  which  are proposed for the Chinese NCAP (C-NCAP) TW-AEB testing. To achieve the second and third objectives, counterfactual virtual simulations were performed with and without TW-AEB to a) a C-NCAP TW-AEB test scenario set ; b) an alternative scenario set based on the results of Paper I; and c) real-world crashes in China. Results show much  higher crash avoidance rate and lower impact speed were found for C-NCAP scenario set than for the other two sets. To better reflect car crashes with TW in China, longitudinal same-direction scenarios with  the  car  or  TW  turning  and  perpendicular  scenarios  with  high  TW  traveling speed are recommended to be included in C-NCAP future releases. Future  work  will  focus  on  assessing  the  combined  benefit  of  preventive  and protective safety systems for car-to-TW crashes in China.

Link to the complete thesis with its including papers: Car crashes with two-wheelers in China: Proposal and assessment of C-NCAP automated emergency braking test scenarios (chalmers.se)

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