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

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 ...

AI Technical Summary

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 traffic flow operation state and the vehicle operation state at the intersection from the perspective of the spatio-temporal propagation of traffic flow.

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