STUDY ON THE INFLUENCE OF PACE-MAKER-LIGHT ON CAR-FOLLOWING BEHAVIORS CONSIDERING RELATIVE SPEED VARIATIONS

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  • 追従時の相対速度変動に着目した走光型視線誘導システムの影響分析

Abstract

<p>There has been an increase in the cases of installation of the Pace-maker light (hereafter, PML) as a countermeasure against traffic congestion at sag bottlenecks of freeways in Japan. PML creates a flow of LED light traveling with constant speed alongside the car. It intends drivers to perceive the speed gap between PML and their own vehicles and encourage the spontaneous speed recovery on uphill section at sag. It has been reported that traffic congestion at some bottlenecks were mitigated due to the installation of PML, though its influence on the driving behavior and the mechanism of congestion-mitigation were still unrevealed. In this study, based on a car-following experiment conducted on the Hanshin Expressway Route 3. From the obtained data, in the first, we analyzed quantitatively the relative speed by PML operation conditions. Next, the car following-behavior model was constructed in consideration of the deviation of the relative speed due to the driver's cognition and then the parameters were estimated. As a result, by operating PML, 1) from the quantitative analysis, PML contributes to the stabilization of following behavior in the whole driver. 2) From the analysis by the car following-behavior model, it is confirmed that the parameters related to the cognition of the relative speed change are improved and the passing time of the target section of the car-following group is shortened by running simulation.</p>

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