The Suitable Index of Flow and Density in the Mixed Traffic

2nd Transdisciplinary Research on Environmental Problems in Southeast Asia

地球科学;生态环境科学

Arirja Gani, Fadly^1 ; Yoshii, Toshio^2 ; Kurauchi, Shinya^2

Graduate School of Science and Engineering, Ehime University, Bunkyo-cho, Matsuyama

790-8577, Japan^1

Department of Civil and Environmental Engineering, Ehime University, Bunkyo-cho, Matsuyama

790-8577, Japan^2

关键词: Area Occupancy;    Detection zones;    Flow;    Fundamental diagram;    Measurement interval;    Mixed traffic;    Occupancy;    Traffic analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/71/1/012015/pdf
DOI  :  10.1088/1755-1315/71/1/012015

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Some traffic indices were developed to consider the existence of vehicle variance either in the homogeneous or mixed traffic. This study investigates the proper index of flow and density in the mixed traffic. There are eight pairs of indices of traffic flow and density that will be compared, in which it was varied by the concept and the measurement interval. The concept was distinguished according to the respond to the variance of vehicles in the traffic analysis, and the measurement interval was differentiated over time and time-space. The traffic was observed over a short section of a road which set as the detection zone. All pairs of indices will be applied and evaluated on the Fundamental Diagram to describe the actual traffic state in the density-flow plane. Then, the R-square of each density-flow curve will be compared. The result shows that the existence of vehicle variance in the share of traffic can be described more properly by considering the projected area of vehicles. The index of flow and density which considers the projected area of vehicles can explain the actual traffic state more appropriately by increasing the R-square of the model. In addition, the result does not provide a significant difference between the measurement over time and time-space in a short section of the road.