Traffic flow database generation method based on time slice division

A technology of time slice and traffic flow, applied in data processing applications, electrical digital data processing, special data processing applications, etc., can solve the problems of waste of resources, long user time, reduction of time efficiency and energy utilization efficiency, etc., to avoid congestion effect of road

Inactive Publication Date: 2015-09-16
四川汇源吉迅数码科技有限公司
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Problems solved by technology

However, in the current intelligent transportation system, the path planning follows the preset road network topology, and the same road is always given between the same source and destination nodes, and the path planning is not carried out intelligently due to different time periods and different traffic volumes. To adapt to the change of traffic flow, the path given in this way is o...

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  • Traffic flow database generation method based on time slice division
  • Traffic flow database generation method based on time slice division

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Embodiment Construction

[0017] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0018] Such as figure 1 As shown, a vehicle flow database generation method based on time slice division includes the following sub-steps:

[0019] Step 1: Obtain historical traffic information of road i:

[0020] From the urban traffic dispatch center, user feedback, and historical flow statistics, the traffic flow of each road in the whole city in 3 months is obtained, and the traffic flow curve of road i in the past 3 months is obtained;

[0021] Step 2: Obtain the flow curve of road i at each time in an average day:

[0022] From the traffic flow curve of road i in the past 3 months, average the traffic flow of each period of the day to obtain the average traffic flow curve of road i in one day;

[0023] Step 3: Fit the curves fi(xi) and gi(xi) from the two p...

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Abstract

The invention discloses a traffic flow database generation method based on time slice division. The method comprises the steps that the historical traffic flow information of a road i is acquried; according to the traffic flow information, the traffic flow curve of each period of every day of the road i is acquired; a first peak point X (im1) and a second peak point X (im2) on the traffic flow curve are used as cut-off points, curves fi (xi) and gi (xi) are fitted; fi (xi) and gi (xi) are respectively divided into N/2 time slices, and a split point is seeked, so that the area enclosed by a step function and the fitted curves are the smallest; the traffic flow of each time slice of the road i is set; steps from 1 to 5 are repeated, and the traffic flow of each time slice of other roads are calculated to form a traffic flow database. According to the method, according to the historical traffic flow information of each period of the whole road network topology, the daily traffic flow curve of each road is divided into a number of time periods according to a peak division method; different traffic flow can be preset in different periods; and the database of the whole road network topology is generated.

Description

Technical field [0001] The invention relates to a method for generating a vehicle flow database based on time slice division. Background technique [0002] With the gradual modernization of the urbanization process, the increasing congestion of urban traffic has brought many problems to urban construction and life, especially the increase in personal car consumption in recent years, and the scarcity of land resources, resulting in a high-density living environment and high-flow traffic The contradiction between supply and demand, leading to traffic congestion is an important factor that seriously hinders the further development of the city. In the traffic road network, finding the optimal route between any two points is the basic function of travel navigation. The optimal path is generally the path with the shortest distance or the path with the shortest time. [0003] In the field of intelligent transportation, the core module: path planning, often determines the pros and cons o...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06F17/30
Inventor 贺麟王玺刁造翔章小宁王燚
Owner 四川汇源吉迅数码科技有限公司
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