Sectional type urban road traffic state estimation method

A technology for road traffic and state estimation, applied in the field of intelligent transportation, to overcome ambiguity and improve accuracy and reliability

Active Publication Date: 2016-08-24
HANGZHOU YUANTIAO TECH CO LTD +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the ambiguity problem of speed and flow conversion in traffic state estimation, the present invention provides a segmented urban road traffic state estimation method

Method used

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  • Sectional type urban road traffic state estimation method
  • Sectional type urban road traffic state estimation method
  • Sectional type urban road traffic state estimation method

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Embodiment Construction

[0035] Below in conjunction with accompanying drawing in the embodiment of the present invention figure 2 , clearly and completely describe the technical solutions in the embodiments of the present invention, obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] figure 2 As shown in a road section in Hangzhou City, three types of traffic flow detectors are installed on the road section: high-definition bayonet 1, microwave 2 and ground sense coil 3. Among them, bayonet 1 is installed near the entrance of the road section, and microwave 2 is installed near the middle of the road section. The ground induction coil 3 is installed near the exit of the road section. The traffic flow measured in one cycle passin...

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Abstract

The invention belongs to the intelligent transportation technical field and relates to a sectional type urban road traffic state estimation method. The method of the invention includes the following steps that: (1) traffic flow detectors are located in different locations in a whole road section, and the whole road section is divided into three sub road sections, namely, an upstream road section, a midstream road section and a downstream road section; (2) the speeds of the sub road sections are calculated through using a speed-flow polynomial traffic flow model; (3) the average speed of the whole road section is calculated according to the speeds of the sub road sections; (4) the traffic state of the road is calculated according to the average speed of the whole road section; and (5) the calculation model can be extended according to the change of the number of the traffic flow detectors. With the sectional type urban road traffic state estimation method provided by the technical schemes of the invention adopted, the problem of ambiguity in a speed-flow conversion process can be solved, and the accuracy and reliability of road traffic state prediction can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to a segmented urban road traffic state estimation method. Background technique [0002] Urban road traffic is facing a series of challenges such as traffic safety, traffic congestion, and traffic pollution. The attention of traffic management departments and the public to the operation status of urban traffic continues to increase. Usually, the road traffic state is measured according to the average speed of the road section. At present, various types of traffic flow detectors such as coils, microwaves, and bayonets are generally installed on the roads in various cities. In addition, on-board GPS is deployed on a large number of buses and taxis to obtain traffic flow data. The above traffic flow detectors can basically measure the traffic flow more accurately, but to accurately convert it into the average speed of the road, it needs to rely on an appropriate spe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01
Inventor 夏莹杰刘强单振宇周国民
Owner HANGZHOU YUANTIAO TECH CO LTD
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