01493116

Component

https://doi.org/10.3141/2380-05

http://scholar.google.com...+Xin&publication_year=2013

This paper proposes a method to detect and to track in real time three traffic shock waves (i.e., queuing, discharge, and departure) that appear in a section at a signalized intersection. Detection and tracking of the shock waves are accomplished by conjugated low-angle cameras, one of which is installed in front of the stop line and the other at a proper place behind the stop line. The cameras jointly monitor the regions of interest in the section with opposite and long-range views. On the basis of the weighted least squares method, the video data captured by the conjugated cameras are fused at the pixel level. Then the fused images are adapted to track the queuing and discharge shock waves in real time by a duplex, flexible window algorithm. Simultaneously, the Haar feature-based AdaBoost cascade classifiers are adopted to identify the vehicle tails and heads and to adjust the tracking results in the flexible window. To track the departure shock wave in real time, the discharge speed of vehicles is obtained through the combined tracking of sparse feature points of the vehicles in the regions of interest of the conjugated cameras. Experimental results show that the proposed method can track the traffic shock waves accurately in real time under changed light conditions during evening rush hour. The tracking results of the shock waves can be further applied to obtain various traffic parameters (e.g., queue length, stop delay, discharge time).

01490620

13-2463

English

pp 36-47

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309263351

Print

Figures; References

Cameras; Detection and identification technologies; Real time information; Signalized intersections; Traffic characteristics; Traffic flow

Data and Information Technology; Highways; Operations and Traffic Management; I72: Traffic and Transport Planning; I73: Traffic Control

TRIS, TRB, ATRI

Sep 17 2013 11:31AM

• Assessment of Dynamic Speed Limits on Freeway A20 near Rotterdam, Netherlands
• Congestion Relief Based on Intelligent Transportation Systems in Florida: Analysis of Triple Bottom Line Sustainability Impact
• Evaluation of Wide-Area Traffic Monitoring Technologies for Travel Time Studies
• Hybrid Work Zone Information System with Portable Changeable Message Signs and Dedicated Short-Range Communication
• Improving Accuracy and Precision of Travel Time Samples Collected at Signalized Arterial Roads with Bluetooth Sensors
• Performance Characterization of Arterial Traffic Flow with Probe Vehicle Data
• Relationship Between Application Scale and Maximum Time Latency in Intelligent Transport Solutions
• State of the Practice on Use of Intelligent Transportation Systems at U.S.–Mexican Land Border Crossings
• Traffic Management Effects of Variable Speed Limit System on a German Autobahn: Empirical Assessment Before and After System Implementation
• U.S. Integrated Transportation Systems in the Future, 2030 to 2050: Application of a Scenario Planning Tool
• Wavelet–k Nearest Neighbor Vehicle Classification Approach with Inductive Loop Signatures