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Novel dynamic-road-network-based traffic guidance method

A technology of traffic guidance and dynamic road network, which is applied in the traffic control system of road vehicles, traffic control system, arrangement of variable traffic instructions, etc., and can solve the problem that the optimal route is far apart

Active Publication Date: 2015-06-03
TONGJI UNIV
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Problems solved by technology

For large-scale dynamic road networks, this method has certain defects. Because the state and smoothness of the road are changing all the time, the optimal path calculated in a static environment may be far from the actual one.

Method used

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  • Novel dynamic-road-network-based traffic guidance method
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  • Novel dynamic-road-network-based traffic guidance method

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Embodiment Construction

[0018] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] Principle: This invention proposes real-time intersection traffic flow modeling based on smart cameras, and on this basis, the routing idea in the computer network is introduced into the shortest path query, and a delay mechanism is added to ensure the correctness of the query results.

[0020] Such as figure 1 Schematic diagram, smart cameras are installed at each intersection of traffic monitoring, which can count passing vehicles and calculate their speed. Smart cameras at adjacent intersections are connected via a network and can send messages to each other.

[0021] figure 2 It is an implementation process of the present invention, including real-time intersection modeling and path planning query.

[0022] Such as figure 2 As shown, the smart camera fuses the collected information such as the number of vehicles and the speed ...

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Abstract

A novel dynamic-road-network-based traffic guidance method includes: intelligent cameras acquire road condition information of traffic crossings in real time, including speed and vehicle number; each crossing is subjected to real-time traffic flow modeling by a modified hydromechanics-based traffic flow model; time periods of vehicles passing the crossings are converted into network transmission delay according to the crossing models; shortcut querying is performed by means of delay routing; the vehicles are guided with optimal driving paths. Real-time traffic flow modeling is based on the crossing intelligent cameras, and accordingly the shortcut querying method based on the delay routing mechanism is realized and real-time traffic guidance is realized.

Description

technical field [0001] The invention relates to real-time traffic guidance of a dynamic road network. Background technique [0002] With the development of my country's social economy, the number of cars has increased rapidly, and traffic congestion has become a common problem in daily life. The vehicles are guided on the driving route, and the traffic flow is spatially diverted to realize the optimal distribution of traffic flow, so as to effectively solve the problems of urban traffic congestion and congestion. [0003] At present, the main data source for traffic flow modeling is the GPS data of floating vehicles. These data have little information, only contain vehicle location information, and have a high delay. They are updated every 5 minutes or so on average. Therefore, based on this data Traffic flow modeling has the disadvantages of inaccuracy and high delay. At the same time, the current traffic guidance system mainly adopts the centralized processing method, whi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/09G08G1/0968
Inventor 蒋昌俊张亚英陈闳中闫春钢丁志军章昭辉龙其
Owner TONGJI UNIV
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