Active safety systems, such as Antilock Braking System (ABS), Electronic Stability Control (ESC or ESP) and Brake Assist System (BAS or EBA), are supposed to bring safety to car occupants and also other road users. The current paper proposes an experimental approach to estimate the expected effectiveness of enhanced braking systems. Crash severity (i.e. collision speed) reduction can be used to estimate the potential gain in casualties (like car occupants and vulnerable road users) thanks to BAS. The Laboratory of Accidentology, Biomechanics and studies of human behavior, PSA Peugeot Citroen - Renault (LAB), has conducted an experiment on test tracks where driver behavior, cars dynamics and braking system parameters were recorded in three rear-end accident scenarios. 95 common drivers, women and men of various ages, participated in the study. They were dispatched in 3 homogenous groups. After 45 minutes of familiarization with the car in 'ecological' conditions, each driver was asked to follow a vehicle pulling a trailer for several laps. In the last lap and under approximately the same conditions of speed (?80 km/h) and distance (?23 m), the subjects were surprised by the 'sudden' release of the trailer which strongly braked. The three groups are: Drivers of group 1 drive an 'old vehicle' (1995 generation) non-equipped with BAS. Both sides of the drivers track were free allowing them to avoid the target by steering and/or braking actions; Drivers of group 2 drive a 'recent' vehicle (2004 generation) equipped with BAS under the same conditions as group 1; Drivers of group 3 drive the same vehicle as G2, but some traffic cones were added on both sides of the drivers way in order to limit their actions to only braking. The results of the study provide an insight into drivers use of cars braking aptitude and their potential behavior adaptation with new generation cars.


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    Title :

    Effectiveness of emergency brake assist in rear-end accident scenarios


    Additional title:

    Leistungsfähigkeit von Notbremsungssystemen in Auffahrunfallszenarien


    Contributors:


    Publication date :

    2006


    Size :

    12 Seiten, 9 Bilder, 3 Tabellen, 14 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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