Road network traffic flow characteristic simulation method based on Manhattan city network containing long-range connecting edges

Abstract

The method comprises the following steps: firstly, constructing a Manhattan city network, randomly setting a long-range connection edge, and setting a traffic signal lamp by adopting a single-port clockwise timing release rule; then, updating the vehicle state by adopting an updating rule based on a NaSch model, and setting different vehicle maximum driving speeds for the Manhattan city network and the long-range connection edge; secondly, randomly selecting a starting point and an ending point of the vehicle, and setting the vehicle to run according to the shortest path; and finally, settingthe particle density and the total number of particles, initializing a system, and simulating the road network traffic flow characteristics by adopting a parallel updating rule. According to the method, a road section model, an intersection model and a road network model of road network traffic flow characteristics are comprehensively considered; meanwhile, long-range connection edges, vehicle ODattributes and shortest path driving rules are set, different vehicle maximum driving speeds are set for the long-range connection edges and the Manhattan urban network, and the actual characteristicsof vehicles and the multi-layer performance of the urban road network are better simulated.

Description

Technical field [0001] The invention relates to a road network traffic flow characteristic simulation method of intelligent transportation. The road network traffic flow characteristic simulation method can provide a theoretical basis for road planning, traffic control and traffic management. Background technique [0002] With the rapid economic development and the continuous advancement of urbanization, the number of motor vehicles continues to grow, and the load on urban roads continues to increase, resulting in more and more severe tests of urban traffic, and the problem of traffic congestion is becoming more and more serious. How to rationally plan traffic resources and alleviate urban traffic congestion has become an urgent problem to be solved. Traffic flow theory is a theory that analyzes the relationship between people, vehicles, roads, and the environment, and studies the relationship between traffic flow, speed, and density. Road network traffic flow characteristics sim...

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Problems solved by technology

[0005] At present, the existing road network traffic flow characteristics simulation methods mainly have the following problems: 1) they cannot fully consider the road section model, road network model and intersection model; ) attributes, path selection, etc.; 3) The multi-layered network is not considered. The real urban road network is a multi-layered complex network, and the existing network structure does not reflect this characteristic.

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