Double-layer Boundary Control Method of Road Network in Urban Congested Area

Abstract

The invention discloses a method for controlling the double-layer boundary of the road network in the urban congestion area. The microscopic simulation model of the road network is established by using the GPS data of the taxi and the field survey data, and the macro basic diagram (MFD) of the road network is constructed at the same time. Firstly, according to the road network boundary control method including control delay (first-level control), the expected total amount of road network entry is determined, and then each control intersection is expanded into a virtual sub-area road network in a certain way to reduce the variance of road network density distribution In order to control the target, considering the queuing overflow control caused by the control of the total amount of road network entry, the distribution method of the total amount of road network entry (the second layer of control) is developed. Compared with the commonly used boundary control method, the optimal control method of total control allocation improves the performance of the road network stably and effectively, avoids the queue overflow caused by the control of the road network, and has practical engineering application value.

Description

technical field [0001] The invention belongs to the field of regional road network traffic control, and specifically relates to a regional road network boundary total amount control and a road network expected entry total amount allocation optimization method including control delay, that is, a regional road network double-layer boundary control method. Background technique [0002] The problem of urban traffic congestion in my country is becoming increasingly serious, and the scope of congestion has gradually expanded from a single intersection and road section to a regional road network. In order to solve the increasingly systematic and global problem of urban traffic congestion, it is urgent to explore real-time traffic control methods at the road network level. [0003] In recent years, scholars at home and abroad have proposed a network-level macro basic diagram (MFD) with reference to the three-parameter basic diagram of traffic flow on road sections. MFD is independe...

AI Technical Summary

Problems solved by technology

However, the distribution method of the total amount of control directly affects the internal density distribution of the road network, and the internal density distribution of the road network has a significant impact on the overall performance of the road network

Regarding the optimal distribution of the total control amount, the existing research has not paid enough attention to key elements such as the selection of the research scope, the target state of the road network density distribution, and the requirements for the entry volume of the road network boundary.

At the same time, the existing research ignores the possible problem of queuing overflow caused by control in the upstream section of the control intersection

This problem directly affects the feasibility of the control scheme in practical applications, and the lack of consideration of this problem will make the control algorithm impractical

Images