Method for monitoring road conditions in real time based on simplified road network model

A road network and model technology, applied in the field of real-time road condition monitoring based on simplified road network models, can solve problems such as errors and complex calculation methods, and achieve the effect of wide data sources, simplified road network models, and high cost of acquisition equipment

Inactive Publication Date: 2014-03-26
HANGZHOU JIUSHU NETWORK TECH
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Problems solved by technology

Since the vehicle-mounted terminal equipment will not always send location information at the intersection, it is necessary to use the passing time of some road sections to calculate the passing time of the entire road section, which involves the use of the Logit model, and the calculation method is complex and has certain errors

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  • Method for monitoring road conditions in real time based on simplified road network model
  • Method for monitoring road conditions in real time based on simplified road network model
  • Method for monitoring road conditions in real time based on simplified road network model

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[0039] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0040] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0041] The invention adopts a simplified road network model as the basis for real-time road condition monitoring. like figure 1 As shown, there are five nodes p, q, x, i and j in this small simplified road network model, where these five nodes can be common intersections, traffic light intersections, overpasses and ring roads. There are two-way streets between nodes p and q, p and j, i and j, and q and i, so there are two directed arcs with...

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Abstract

The invention discloses a method for monitoring road conditions in real time based on a simplified road network model and belongs to the field of road junction monitoring. The method comprises the following steps of: firstly, establishing the simplified road network model, abstracting ordinary intersections, traffic light intersections, overpasses and loops as nodes, abstracting a one-way road section between two nodes as a directed arc, abstracting a two-way road section between the two nodes as two directed arcs, and weighting at least one time cost weight value on each directed arc; secondly, periodically acquiring time at which a vehicle enters a starting node y and an ending node z and acquiring the information of the current position of the vehicle and the information of entering direction; and finally, determining the type of roads, and thus respectively obtaining the road condition states of ordinary roads, the loops and overpass roads by using different steps. By adoption of the method, the road condition states of the ordinary roads, the loops and the overpass roads can be simply and accurately obtained, and the road condition states are drawn on a map, so that the road conditions can be monitored in real time.

Description

technical field [0001] The invention relates to a road condition monitoring method, in particular to a real-time road condition monitoring method based on a simplified road network model. Background technique [0002] Urban road traffic operation status information (road condition information) has always been the key information in the intelligent transportation system (ITS), its accurate and real-time acquisition and processing is the basis of traffic guidance, traffic control and other applications. The real-time traffic monitoring service provides real-time road information to travelers (commuters, private cars, taxis, ambulances, etc.) through broadcasting, text messages, and roadside electronic display boards through the obtained traffic status information. , to help travelers avoid these road sections when choosing traffic, and reach their destination quickly, and it can also help the traffic police to find road blockage sections and arrange human congestion removal. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/01G08G1/00
Inventor 朱征宇刘琳郭崇霄崔明甘中强
Owner HANGZHOU JIUSHU NETWORK TECH
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