Applying Least Squares Support Vector Machines for Prediction of Red-Light-Running Based on Continuous Vehicle Trajectories Measurements

The prediction of red-light running (RLR) at a signalized intersection is a crucial component of dynamic all-red extension (DARE) that avoids potential collisions caused by RLR behaviors. Previous studies on RLR prediction are usually based on discrete measurements of fixed sensors, e.g. inductive loop detection (ILD). This paper formulates the RLR prediction as a binary classification problem that can be solved by the least square support vector machines (LS-SVM) models based on continuous trajectories detected by radar sensors. We adopt non-weighted and weighted LS-SVM models for the RLR prediction. Tuning parameters are conducted by the cross-validation in the discrete parameter space and the Bayesian inference based on the maximum a posteriori probability (MAP) estimate in the continuous parameter space. Based on continuous trajectories, this study selects the velocity, acceleration and distance to the stop line at the red light onset time as attributes plotted in a 3-D scatter diagram. The validation results show that the performance indicated by the receiver operation characteristics (ROC) curves of the LS-SVM RLR prediction performs much better than that of the ILD model. Compared with the non-weighted LS-SVM classifier, the weighted LS-SVM classifier for RLR prediction is more flexible. In order to further reduce the RLR missing rates of based on the previous LS-SVM solution, the weighted LS-SVM is developed with a tolerated small false alarm rate by allowing a variety of unbalanced ratios to identify the relative significance of each class.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AHB25 Traffic Signal Systems.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Chen, Xiqun (Michael)
  • Lin, Xi
  • Xu, Dingyuan
  • Wang, Yinhai
  • Li, Meng
• Conference:
  • Transportation Research Board 93rd Annual Meeting
  • Location: Washington DC
  • Date: 2014-1-12 to 2014-1-16
• Date: 2014

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: 20p
• Monograph Title: TRB 93rd Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Highway safety; Least squares method; Loop detectors; Mathematical models; Red interval (Traffic signal cycle); Red light running; Signalized intersections; Traffic flow
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; I73: Traffic Control; I85: Safety Devices used in Transport Infrastructure;

Filing Info

• Accession Number: 01506630
• Record Type: Publication
• Report/Paper Numbers: 14-3397
• Files: TRIS, TRB, ATRI
• Created Date: Feb 7 2014 10:12AM