An elevated urban expressway connects to its frontage roads by on/off ramps. Under the expressway, frontage roads, two pairs of on/off ramp terminal and cross streets construct the complex at-grade intersection. One typical complex intersection under the Inner Ring Expressway in Shanghai was selected in this study. The main reason for congestion at this intersection is that traffic movements with different origin-destination (OD) weave within the section from the ramp terminal to the stop-line on the departure legs. To eliminate the weaving operation, lane function was reassigned, and signal timing was redesigned to a five-phase scheme. Simulation tool VISSIM 4.1 was applied to evaluate performance of the new intersection. Simulation results indicated that significant reduction of vehicle delay and queue length in the new scheme.
Traffic Management on an At-Grade Signalized Intersection Connecting to Urban Expressway Ramps
Ninth International Conference of Chinese Transportation Professionals (ICCTP) ; 2009 ; Harbin, China
ICCTP 2009 ; 1-8
2009-07-23
Conference paper
Electronic Resource
English
Traffic Management on an At-Grade Signalized Intersection Connecting to Urban Expressway Ramps
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