Road water immersion event emergency dredging flow distribution generation method

An emergency and event technology, applied to the arrangement of variable traffic instructions, etc., can solve the problems of urban residents’ daily travel inconvenience, road traffic capacity attenuation, and inability to simulate effectively, so as to shorten the update cycle, slow down traffic congestion, and reduce traffic The effect of the accident

Active Publication Date: 2015-01-28
SUN YAT SEN UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0005] Road flooding incidents caused by heavy rain are likely to cause attenuation of road traffic capacity, resulting in road congestion, and may even cause traffic accidents, bringing inconvenie...

Method used

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  • Road water immersion event emergency dredging flow distribution generation method
  • Road water immersion event emergency dredging flow distribution generation method
  • Road water immersion event emergency dredging flow distribution generation method

Examples

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Embodiment 1

[0081] The flow redistribution method announced by the present invention will be described in detail below in conjunction with an embodiment:

[0082] The road network, the flow rate of each road section and the actual traffic capacity are as follows: image 3 As shown, it can be seen that the flow from node 19 to node 21 overflows, and the steps are as follows:

[0083] 1. Find the first new path from node 19 to node 21, the result is as follows Figure 4 .

[0084] 2. Flow transfer. The difference between the actual traffic capacity and the actual flow of each road section of the new path is 10, 12, and 12 respectively. The overflow flow of the original road section (19->21) is 30. Take the minimum value of 10 to transfer. Figure 5 for Figure 4 The result after the road network traffic is transferred.

[0085] 3. Repeat steps 1 and 2, the result is as follows Figure 6-11 .

[0086] 4. Expand the upstream section. The upstream road section from node 19 to node 21 is...

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Abstract

The invention discloses a road water immersion event emergency dredging flow distribution generation method. The method includes utilizing road net data and water logging data as known quantities, first conducting map matching on the water logging data to acquire water logging points and corresponding depths in road sections, calculating the maximum water logging depth of each road section based on the cask principle, generating basic information for triggering emergency scheme event according to the corresponding water logging depth, then utilizing a road section damage function to calculate the actual traffic capacity of each road section, meanwhile utilizing daily traffic flow data obtained through traffic investigation and clearing as the basic load flow of the current road sections, generating a water immersion road section dredging scheme by conducting flow redistribution on the road sections with the basic flow larger than the actual traffic capacity in the reasonable dredging area and finally outputting the emergency dredging scheme. The method is based on the ideas of traffic dynamic distribution and depth-first search, combines the onsite road net data and generates emergency dredging schemes in different areas under different water immersion depth scenes.

Description

technical field [0001] The invention relates to the field of dynamic traffic distribution, and more specifically, to a method for generating emergency dredging and distribution of road flooding events. Background technique [0002] For general traffic allocation, the OD matrix is ​​known and determined, regardless of its change over time, so it is called static traffic allocation. Dynamic traffic allocation is to analyze the optimal traffic flow distribution mode under the condition of known traffic supply and traffic demand status, and re-allocate people's existing demand rationally on space and time scales through certain control means and induction strategies , so that the traffic road network can run efficiently and provide a basis for traffic flow management and dynamic route guidance. [0003] According to different methods of describing traffic flow, dynamic traffic allocation models can be divided into simulation models and analysis models. In the simulation model,...

Claims

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Application Information

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IPC IPC(8): G08G1/09
CPCG08G1/09
Inventor 胡继华柳林李国源梁嘉贤高立晓周素红刘凯
Owner SUN YAT SEN UNIV
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