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Road block-oriented road network traffic flow change quantitative calculation method

A quantitative calculation, traffic flow technology, applied in the field of traffic engineering, can solve the inaccurate calculation of road network traffic flow changes, the lack of traffic flow dynamics affecting the local correlation of road spatial structure, the static topology structure of urban road network and dynamic traffic flow characteristics Difficulty and other problems to achieve the effect of accurate calculation

Active Publication Date: 2021-07-09
CENT SOUTH UNIV
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Problems solved by technology

[0004] The static topological structure and dynamic traffic flow characteristics of urban road networks are usually difficult to integrate and analyze. As a result, most of the existing evaluation methods focus on the global evaluation indicators of the static road network and ignore its dynamic change process. Due to the dynamic influence of the structure and the local correlation of the road spatial structure, the calculation of the change of the road network traffic flow is not accurate

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  • Road block-oriented road network traffic flow change quantitative calculation method
  • Road block-oriented road network traffic flow change quantitative calculation method
  • Road block-oriented road network traffic flow change quantitative calculation method

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specific Embodiment approach 1

[0121] In order to verify the effectiveness of the present invention, as Figure 6 It is a schematic diagram of the simulated network verification data of the embodiment of the present invention, using the classic Nguyen network as the verification data. In order to facilitate the visualization of the dynamic disturbance process of traffic flow on other road sections and increase the interpretability of the results, a starting point and 2 target points and set the same traffic demand (200) respectively.

[0122] By tracking the trajectory of the traffic disturbance in the network data, the traffic flow disturbance response G with obvious spatio-temporal characteristics can be obtained ij result. In terms of spatial characteristics, such as Figure 7 It is a schematic diagram of the dynamic response results of traffic flow disturbance in the embodiment of the present invention. Since the initial traffic demand is much smaller than the carrying capacity of the road section, th...

specific Embodiment approach 2

[0132] The core business district of Hankou is the commercial center, financial center and transportation hub of Wuhan City and central China. Smooth transportation is the basic guarantee for the stable economic development of the region. In the event of traffic congestion, accidents, etc. that seriously affect the passage of individual road sections, traffic control measures such as temporary blockade of road sections and lane closures need to be taken. How to determine the chain reaction of traffic flow caused by blockade of road sections is the crux of the problem in formulating control measures.

[0133] This embodiment extracts the core area of ​​Hankou, Wuhan City as the application background, detects the correlation mode of the road sections in this area, and then calculates the traffic flow changes, and proposes a traffic control plan. This embodiment uses Hankou collected from May 1 to May 10, 2014 The taxi trajectories in the district are used as the traffic travel d...

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Abstract

The invention discloses a road blocking-oriented road network traffic flow change quantitative calculation method, which comprises the following steps of: firstly, proposing a quantitative expression model of a road section node flow dynamic value by analyzing the characteristics of road network flow time dependence and flow accumulation; giving a cascade reaction function of a flow change rate between nodes of starting and ending road sections by tracking a tiny disturbance diffusion propagation process of road network flow, so that a flow disturbance response matrix between the road sections is solved; and finally, proposing a correlation model integrating a time lag operator and a spatial diffusion operator to calculate road network traffic flow change caused by traffic flow space-time delay to road section correlation. According to the method, response steady-state values of other road sections are tracked and captured by loading trace traffic flow disturbance at any road section node, the dynamic space-time correlation of space local road section nodes can be detected, and the traffic flow change of a road network can be accurately calculated.

Description

technical field [0001] The invention belongs to the field of traffic engineering, and in particular relates to a quantitative calculation method for road network traffic flow changes facing road blockades. Background technique [0002] Nowadays, the number of vehicles on the road is increasing day by day, and the problem of road congestion is becoming more and more serious. Therefore, it is necessary to predict the traffic state of the road network. [0003] Assuming that some local nodes and road sections have attenuated or failed emergencies in the road network, the various traffic flow indicators after the failure of the road section are statistically analyzed by means of traffic distribution, so as to determine the importance of each road section node in the road network. degrees and their correlations. The innovation points of this kind of method focus on three aspects: failure strategy of road section, traffic distribution method and evaluation index of road section. ...

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Application Information

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IPC IPC(8): G08G1/01G08G1/065
CPCG08G1/0125G08G1/065
Inventor 刘宝举邓敏龙军石岩
Owner CENT SOUTH UNIV
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