Method for real-time estimation of queuing length of signalized intersection based on vehicle track

A technology of vehicle trajectory and queuing length, applied in the direction of controlling traffic signals, etc., can solve the problems of affecting the estimation accuracy, ignoring, and failing to obtain signal parameter information

Active Publication Date: 2017-01-25
TONGJI UNIV
View PDF6 Cites 42 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Summarizing the existing research on queuing length estimation based on vehicle trajectories, there are mainly the following problems: (1) Assuming vehicle arrival (uniform or Poisson arrival), this assumption ignores the impact of upstream intersections on vehicle arrival; (2) Assuming floating vehicles Sampling rat

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for real-time estimation of queuing length of signalized intersection based on vehicle track
  • Method for real-time estimation of queuing length of signalized intersection based on vehicle track
  • Method for real-time estimation of queuing length of signalized intersection based on vehicle track

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0091] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0092] The invention is established based on the LWR traffic wave model, which can well reveal the formation and dissipation process of the vehicle queuing at the intersection. Such as figure 2 As shown, the traffic flow at the intersection satisfies the characteristics of the triangular macroscopic basic graph, figure 2 Middle q: indicates flow (veh / h), K: indicates density (veh / km), q 1,1 : It is used to indicate a traffic state at the intersection, q 1,2 : It is used to indicate another traffic state at the intersection, q m : maximum flow at the intersection, k 1,1 :q 1,1 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for real-time estimation of the queuing length of a signalized intersection based on a vehicle track. The method comprises the following steps: (1) judging a vehicle traffic state according to real-time vehicle traffic information; (2) estimating a vehicle queue-joining key point and a vehicle queue-leaving key point according to the real-time vehicle track information, vehicle traffic state and kinematical equation; (3) identifying an upstream reached fleet according to the estimated vehicle queue-joining key point; (4) performing queuing wave and evanescent wave estimation according to the estimated vehicle queue-joining key point, the queue-leaving key point and the identified fleet; and (5) estimating the intersection signal parameter and the queuing length according to the estimated queuing wave and evanescent wave. Compared with the prior art, the method is adaptive to a data environment with low sampling frequency and low sampling rate, and has the advantages of strong robustness, high real-time performance, good accuracy and the like.

Description

technical field [0001] The invention relates to the field of traffic control, in particular to a real-time estimation method for queuing length at intersections controlled by signals of vehicle trajectories. Background technique [0002] As the main part of the urban road network, signalized intersections often cause traffic congestion due to the periodic alternation of traffic lights, which greatly restricts the overall operating efficiency of the urban road traffic system. Queue length is an important indicator for evaluating intersection operation. On the one hand, it can be used to indirectly estimate vehicle delays, parking times, and travel time, and on the other hand, it can be directly fed back for signal timing optimization. [0003] The existing approaches to queuing length estimation based on vehicle trajectories mainly include: (1) Cheng et al. based on high-precision vehicle trajectory data, extracted key trajectory points representing vehicle state changes, and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G08G1/08
CPCG08G1/08
Inventor 唐克双李福樑李克平孙剑
Owner TONGJI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap