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International Journal of Automotive Technology > Volume 7(5); 2006 > Article
International Journal of Automotive Technology 2006;7(5): 603-608.
J. H. CHO, H. K. NAM, W. S. LEE
Kookmin University
As an important and relatively easy to implement technology for realizing Intelligent Transportation Systems (ITS), Adaptive Cruise Control (ACC) automatically adjusts vehicle speed and distance to a preceding vehicle, thus enhancing driver comfort and safety. One of the key issues associated with ACC development is usability and user acceptance. Control parameters in ACC should be optimized in such a way that the system does not conflict with driving behavior of the driver and further that the driver feels comfortable with ACC. A driving simulator is a comprehensive research tool that can be applied to various human factor studies and vehicle system development in a safe and controlled environment. This study investigated driving behavior with ACC for drivers with different driving styles using the driving simulator. The ACC simulation system was implemented on the simulator and its performance was evaluated first. The Driving Style Questionnaire (DSQ) was used to classify the driving styles of the drivers in the simulator experiment. The experiment results show that, when driving with ACC, preferred headway-time was 1.5 seconds regardless of the driving styles, implying consistency in driving speed and safe distance. However, the lane keeping ability reduced, showing the larger deviation in vehicle lateral position and larger head and eye movement. It is suggested that integration of ACC and lateral control can enhance driver safety and comfort even further.
Key Words: Adaptive cruise control (ACC), Driving simulator, Driver behavior
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