• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.12 no.5
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• pp.73-86
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• 2013

This study aimed to measure the behaviors of drivers approaching a roundabout and analyze the characteristics of them. For these objectives, a system to measure the in-vehicle behaviors of a driver when he/she approaches a roundabout. The reliability of the system was analyzed, and the result were applied to a driving test in a roundabout. The result suggested that drivers showed cognitive responses to the accelerator pedal $176.0{\pm}35.18m$ ahead of the approach zone. And they showed cognitive responses to the brake pedal and the speed of the vehicle $121.0{\pm}26.01m$ and $66.0{\pm}18.31m$ ahead of the approach zone, respectively. As for drivers' cognitive changes between the start and end points of their cognitive responses at a roundabout, the standard deviation of the time of response was ${\pm}26.01m$, and the standard deviation of the end point was ${\pm}7.03m$, which meant that there was a 3.71-fold gap between the two deviation values. During the test, differences among the drivers were observed, but no difference was observed among trails.