Evacuation traffic flow distribution model based on traffic basic graph

A technology for assigning models and basic graphs, applied to structured data retrieval, resources, instruments, etc., to achieve the effect of uniform spatial distribution of traffic and easy solution

Active Publication Date: 2019-09-13
BEIHANG UNIV
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  • Abstract
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  • Claims
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  • Evacuation traffic flow distribution model based on traffic basic graph
  • Evacuation traffic flow distribution model based on traffic basic graph
  • Evacuation traffic flow distribution model based on traffic basic graph

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with examples.

[0026] A kind of evacuation vehicle flow distribution model based on the basic traffic graph of the present embodiment is characterized in that: comprising the following steps:

[0027] (1) Download the road network map near the target area from the OpenStreetMap website, clean and correct the road network map data through Baidu map panorama or field survey, and complete the missing lane number data; correct the road speed limit To the real situation, after cleaning and correcting the data, import the road network into the traffic simulation software;

[0028] (2) Allocate traffic flow in the simulation. The specific steps of allocating traffic flow are as follows: first, only load the background traffic flow to obtain the basic traffic map of each evacuation exit, and allocate traffic flow according to the basic traffic map. Finally, the induction coil is arranged near the ...

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Abstract

The invention discloses an evacuation traffic flow distribution model based on a traffic basic graph, being suitable for construction of large-scale activities, natural disasters or major accident emergency plans and emergency response when emergency events occur, and particularly relates to an evacuation traffic flow distribution model based on a traffic basic graph. The evacuation traffic flow distribution model includes the steps: analyzing a map into a Cartesian coordinate system, and determining an evacuation range circle layer according to an evacuation center point through an analysis method; performing traffic simulation on a specific area road network by utilizing a traffic simulation method and a numerical fitting method, and performing fitting to obtain a traffic basic map of akey road section on a corresponding evacuation circle layer; after the basic graph is obtained, establishing an unconstrained optimization model, and obtaining the maximum flow of the key road sectionthrough derivation; and finally, according to the obtained maximum flow, distributing the probability of selecting a destination by the evacuation traffic flow.

Description

technical field [0001] The present invention relates to a kind of distribution model, more specifically relate to a kind of evacuation vehicle flow distribution model based on traffic basic map. Background technique [0002] Emergency evacuation is very important to protect people's lives and property, but it also faces many challenges, especially in China, which has the largest population in the world. When the evacuation traffic flow is generated, it will be loaded into the road network explosively, resulting in oversaturation of some road sections and local congestion. This will lead to a decrease in evacuation efficiency, which is not only not conducive to the evacuation of the dangerous area as soon as possible, but also has a negative impact on the original road network traffic. Furthermore, due to rumors, personal preferences and incomplete information, these factors may affect the route choice of evacuees. Therefore, in the case of emergency evacuation, the spatial...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06F16/29G06Q10/06G06Q50/26
CPCG06F16/29G06Q10/0631G06Q50/265G06F30/20
Inventor 张钊刘砚玥李大庆童青峰
Owner BEIHANG UNIV
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