Analysis of Traffic Operation Characteristics and Calculation Model of the Length of the Connecting Section between Ramp and Intersection

Fu Wang,Anqi Chen,Dengjun Gu

doi:10.3390/su14020629

Fu Wang, Anqi Chen + Show 1 more

Open Access

https://doi.org/10.3390/su14020629

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Abstract

Many cities have built expressways to alleviate traffic congestion, among which elevated expressways are the most common form. However, traffic congestion still occurs frequently in the connecting section between the ramp of expressway and the ground intersection. Based on the field traffic survey data, the traffic operation characteristics of vehicles in the connecting section and the main factors affecting the length of the connecting section are analyzed. A combined model for calculating the length of the connecting section between ramp of urban expressway and intersection is proposed. VISSIM is used to simulate the traffic flow under the current and calculated length of the connecting section. The comparison results show that under the calculation length, the travel time, average delay, parking time and queue length are reduced to varying degrees, which verifies the rationality of the calculation model.

Highlights

The rapid development of the economy, urban population and car ownership results in serious traffic congestion in many cities [1]
In order to improve the current situation of urban traffic and improve the transport efficiency of the urban road network, an increasing amount of attention has been paid to the construction of the urban expressway, among which the most widely constructed form is the elevated expressway [2]
In view of the disadvantages of the current design of the length of the connecting section between the ramp of the expressway and the grade intersection, which causes serious traffic congestion, this paper studied the distance between the ramp of the expressway and the grade intersection by combining the field traffic survey and the existing theoretical knowledge; the conclusions are as follows: 1

Summary

Introduction

The rapid development of the economy, urban population and car ownership results in serious traffic congestion in many cities [1]. As the elevated expressway mainly connects the ground traffic through the onramp and off-ramp, there are a large number of vehicles queuing up to enter and leave the ramp during the peak hours, resulting in serious congestion at the connecting section between the ramp and grade intersection, which has a great impact on the traffic of the ground and the expressway and reduces the transportation efficiency of the road network. Lim [5] proposed a method to reduce the delay time at the intersection by adjusting the signal timing scheme. Through this method, the traffic efficiency of the connecting section can be improved, the vehicles

Methods

Results

Conclusion