Traffic flow evacuation time estimation method

A technology of evacuation time and traffic flow, applied in the field of transportation, can solve problems such as large deviations in estimation results and insufficient consideration of the discreteness and randomness of the size of evacuated vehicles

Inactive Publication Date: 2016-01-13
XIDIAN UNIV
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Problems solved by technology

However, this method does not fully consider the discreteness of the size of evacuated vehicles ...

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  • Traffic flow evacuation time estimation method

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Embodiment Construction

[0039] The specific implementation environment of the present invention is carried out in the urban road network. Because the urban road network environment is complex and changeable, so the present invention is implemented under the premise of following description:

[0040] 1. The estimation of evacuation time does not consider the influence of traffic lights in the urban road network;

[0041] 2. No distinction is made between traffic jams caused by weather and traffic accidents, and the same evacuation method is adopted;

[0042] 3. Assume that the evacuation of vehicles is enforced, such as traffic police command, without considering other unfavorable evacuation behaviors due to personal interests.

[0043] Attached below figure 1 The present invention is further described.

[0044] Step 1, judge the current road state,

[0045] The current road state is usually divided into two states: traffic congestion and smooth flow. The detection of the current road state can b...

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Abstract

The invention discloses a traffic flow evacuation time estimation method, which mainly solves problems that discreteness of an evacuation vehicle scale and randomness of road section non-evacuation flow are not fully considered when the evacuation time is estimated in the prior art. The method of the technical scheme comprises steps: firstly, a current road condition is judged through congestion detection algorithm, when the road is judged to be in a congestion state, an evacuation strategy selection model is built according to the current road traffic flow, and the objective function of the model uses the shortest evacuation time as a principle and uses basic requirements that the traffic flow in each branch in a road network needs to be balanced as constraint conditions; and then, ant colony algorithm is used for solving the model, and the shortest evacuation time and the longest evacuation time for the current congestion state are obtained. The method of the invention can accurately estimate the needed time for evacuating vehicles when traffic congestion happens, effective information is provided for vehicles yet to come, a theoretical basis is provided for correct traffic commanding by a traffic management department, harms caused by emergent events are reduced to the minimal as much as possible, and the method can be used for traffic management for the urban road network.

Description

technical field [0001] The invention belongs to the technical field of traffic, in particular to a method for estimating traffic flow evacuation time, which can be used in urban road networks. Background technique [0002] With the increasing scale of urban road network, increasing demand for traffic and material circulation, frequent occurrence of natural disasters and other objective reasons, the number, frequency of occurrence, breadth of influence and degree of harm of road traffic emergencies are all showing a clear upward trend. In urban traffic, once an accident occurs, it will often cause vehicles on the road to line up and cause traffic congestion, which increases the difficulty of implementing social management and maintaining stability in the transportation industry, and hinders the maximization of the social and economic benefits of road traffic. Therefore, when there is a traffic jam on the road, correctly estimating the time required for vehicle evacuation can ...

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/30
Inventor 陈晨李娜赵力强杨鲲吕宁
Owner XIDIAN UNIV
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