Method for obtaining everage speed of city road section traffic flow

An average speed and acquisition method technology, applied in the field of intelligent transportation, can solve the problems of low dependence on urban infrastructure conditions, difficulty in obtaining large sample sets for capital investment, etc., achieve fast calculation speed, high reliability, and overcome serious dependence Effect

Inactive Publication Date: 2007-03-28
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention overcomes the problems of a large amount of capital investment and difficulty in obtaining a large sampling sample set when using GPS detection car data to obtain traffic speed in the traditional way, and has the advantages of small investment, simple and convenient calculation, good real-time performance, and dependence on urban infrastructure conditions inferior merit

Method used

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  • Method for obtaining everage speed of city road section traffic flow
  • Method for obtaining everage speed of city road section traffic flow
  • Method for obtaining everage speed of city road section traffic flow

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Embodiment Construction

[0022] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0023] The input data required by this embodiment is collected in real time by the detection coils of the SCATS system at each major traffic signal intersection provided by the SCATS system installed within the outer ring of Shanghai to obtain data such as traffic flow and traffic light duration.

[0024] As shown in Fig. 1, the scheme for obtaining the average speed of traffic flow in urban road sections in this embodiment, the specific implementation steps are as follows:

[0025] 1. Establish the intersection number-road section name correspondence table

[0026] ...

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Abstract

The invention includes steps: (1) establishing corresponding table between number of road junction and name of road section; (2) discriminating and processing error data; (3) obtaining average speed of road section. Average time of travel on road section is equal to sum of average running time and average waiting time. Running length of vehicle is equal to length of road section minus length of vehicle queue at road section under average meaning. Roads are divided into rapid road, main road, secondary road, and branch road. Detecting speed on the spot obtains anticipant speed on different grades of road. Average running time is obtained from average running length of vehicle divided by anticipant speed on different grades of road. Based on M/M/1 theory in queuing theory, the disclosed method obtains average waiting time. Based on length of road, average running time and average waiting time, the method obtains average speed on road. Features are: easy, quick and high reliability.

Description

technical field [0001] The invention relates to a method in the technical field of intelligent transportation, in particular to a method for obtaining the average speed of traffic flow in urban road sections. Background technique [0002] With the rapid development of social economy, on the one hand, the demand for traffic has increased greatly, while the growth of roads has gradually reached its limit, which further intensifies the contradiction between traffic demand and supply; on the other hand, the rapid progress of information technology has brought comprehensive solutions to traffic problems. opportunity. It is against this background that the advanced traffic information management system (ATIMS) has received extensive attention before other systems of the intelligent transportation system (ITS), and has developed rapidly in countries all over the world, and has been applied to dynamic route planning, Dynamic navigation, road network coordination traffic signal syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/052
Inventor 李志鹏刘允才
Owner SHANGHAI JIAO TONG UNIV
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