Browsing by Author "Wu, Hsi-Jen"

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Driver perception uncertainty in perceived relative speed and reaction time in car following - A quantum optical flow perspective
(2015-10-01)
Sheu, Jiuh-Biing
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Wu, Hsi-Jen
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運輸與物流管理系註：原交通所+運管所
;
Department of Transportation and Logistics Management
Driver perception uncertainty characterized in perceived relatnd reaction time plays a key role in influencing car-following behavior; and however, is rarely investigated in related literature. Grounded on quantum optical flow theory, we propose a dynamic and stochastic driver perception model to investigate the relationship between the uncertainty of perceived relative speed and that of reaction time during car following. Specifically, the proposed model hypothesizes that driver perceived speed and reaction time are time-varying and uncertain, and correlate in a trade-off relationship mimicking the form of Heisenberg Uncertainty Principle. To test the assertion that a trade-off relationship of uncertainty in perceived relative speed and reaction time exists in car following, this study conducts qualitative analysis followed by a two-stage experiment rooted in quantum optical flow theory using data collected from a driver simulator. Analytical results further elucidate car-following phenomena under driver-perception uncertainty, potentially facilitating the development of new traffic flow theories. (C) 2015 Elsevier Ltd. All rights reserved.
UNCERTAINTIES OF PERCEIVED RELATIVE SPEED AND REACTION TIME IN CAR FOLLOWING: A QUANTUM OPTICAL FLOW PERSPECTIVE
(2011-01-01)
Sheu, Jiuh-Biing
;
Wu, Hsi-Jen
;
運輸與物流管理系註：原交通所+運管所
;
Department of Transportation and Logistics Management
The paper experiments with the trade-off between the deviations of perceived relative speed and reaction time in car following under driver perception uncertainties. Scope: Rooted in quantum optical flow theory, this study investigates if the trade-off relationship between the uncertainties of perceived relative speed and reaction time exists in a form mimicking the Heisenberg Uncertainty Principle when car following. The leading vehicle speed is controlled in the driving simulator, and a rear signal of the leading car is manipulated as a stimuli. Conclusions: The finding from the experiment indicates that as the deviation of perceived relative speed increases, the deviation of reaction time decreases inferring that there is a trade-off relationship between the uncertainties of driver perceived relative speed and reaction time. The results may help to characterize car following phenomena under driver perception uncertainties to facilitate road safety improvement and stimulate new ideas for traffic theory development.