The efficiency of the roundabout is severely constrained by the presence of multiple conflicting traffic flows in the weaving section. An accurate description of the traffic flow in the weaving section of roundabouts is the key to intelligent traffic control. In this paper, the approach, the circulation section, the weaving section and the exit of roundabouts are taken as a unit to analyze, and a model of traffic flow for entering the weaving section is established. The impact of entering flow, circulation flow and leaving flow on the condition of the weaving section is analyzed and a model of traffic flow for leaving the weaving section is established. A new traffic flow model of the weaving section is also established considering an iterative-algorithm-based parameter calibration method. Finally, this paper builds a VISSIM-based simulation platform and collects field data to verify the accuracy of the traffic flow model. The results show that the average relative error of the simulation outputs and the values of theoretical model calculation is within 10%, and with the increase of passing vehicles, the calculation error decreases. Therefore, the model established in this paper can accurately calculate the traffic flow characteristics of the weaving section in roundabouts, which can provide theoretical support for the microscopic simulation of roundabouts and the formulation of traffic management strategies.
Traffic Flow Model of the Weaving Section in Signalized Roundabouts
Smart Innovation, Systems and Technologies
Proceedings of KES-STS International Symposium ; 2022 ; Rhodes, Greece June 20, 2022 - June 22, 2022
2022-05-15
10 pages
Article/Chapter (Book)
Electronic Resource
English
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