Online urban road route travel time estimation method based on virtual vehicle locus reconstruction

A virtual vehicle and travel time technology, applied in the field of intelligent transportation, can solve the problem of lack of time-space propagation of traffic flow and achieve high timeliness and accuracy

Active Publication Date: 2017-05-10
SOUTHEAST UNIV
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Problems solved by technology

However, most of the existing methods focus on a single intersection as the research object, and lack of revealing the relationship between the traf

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  • Online urban road route travel time estimation method based on virtual vehicle locus reconstruction
  • Online urban road route travel time estimation method based on virtual vehicle locus reconstruction
  • Online urban road route travel time estimation method based on virtual vehicle locus reconstruction

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Embodiment Construction

[0041] The present invention defines the trajectory formed by the combination of shock waves at signalized intersections of urban roads as the traffic wave trajectory of signalized intersections, which is realized according to the traffic wave trajectory of all intersections on the driving path and the driving time of vehicles on all non-queuing sections. The construction of the virtual trajectory of the vehicle on the path, and then estimate the travel time of the vehicle path according to the trajectory coordinates; the detailed steps of this method are as follows:

[0042] S1. The traffic flow data collected in real time is obtained by the vehicle detector in the upstream section of the signal control intersection, and the signal phase information is collected in real time by the intersection signal machine;

[0043] In the implementation, a step of 1 second can be used as the time interval for estimating and updating the traffic wave trajectory at the intersection, and the ...

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Abstract

The present invention discloses an online urban road route travel time estimation method based on the virtual vehicle locus reconstruction. The method comprises the following steps: an intersection upstream road vehicle detector is controlled by signals to obtain traffic flow data collected in real time, an intersection signal machine is configured to collect signal phase information in real time; the intersection traffic wave locus coordinates are estimated in real time, the impact wave i, ii, iii and iv and the time-space operation locus existed at the signal intersection are drew; the vehicle driving sate is simplified to the state of driving at a free flow speed on a non-queue road section or the state of parking at the intersection; the vehicle time-space coordinates corresponding to the special position information in the virtual vehicle coordinates are extracted to obtain the moment of the vehicle passing through the special position so as to realize the estimation of the vehicle route travel time. The online urban road route travel time estimation method based on the virtual vehicle locus reconstruction can obtain the propagation state of a vehicle departing at any time on the route and the online travel time at any plate on the arrival route so as to have higher timeliness and accuracy.

Description

technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to an online urban road path travel time estimation method based on virtual vehicle trajectory reconstruction. Background technique [0002] On urban roads, the travel time of vehicles is mainly composed of the travel time of non-queuing sections and the queuing delay at the intersection, and the queuing delay at the signal-controlled intersection occupies a decisive proportion in the travel time of urban road traffic. Accurate estimation of real-time queuing delays is crucial to improving the accuracy of online estimation of travel time on urban roads. [0003] Early studies on delay estimation at intersections assumed steady-state traffic flow, and estimated the average or total delay of vehicles at signalized intersections by modeling the "arrival-departure" relationship of vehicles at intersections. Typical methods include Webster's delay calculation formula ...

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Application Information

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IPC IPC(8): G08G1/01G06Q10/04
CPCG06Q10/04G08G1/0116G08G1/0137
Inventor 夏井新陆振波安成川
Owner SOUTHEAST UNIV
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