Automated Classification in Traffic Video at Intersections with Heavy Pedestrian and Bicycle Traffic

Pedestrians and cyclists are vulnerable road users and despite their limited presence in traffic events, these two groups have the most collisions resulting in injuries and fatalities. Due to problems regarding data collection for pedestrians and cyclists, there is a shortcoming in the field of road safety with regards to the availability and quality of data for non-motorized modes. Also, due to the constant change of orientation and appearance of pedestrians and cyclists, detecting and tracking them is a hard task. This is one of the reasons why automated data collection methods have mainly been developed to detect and track motorized traffic. This paper presents a methodology based on Histogram of Oriented Gradients to extract features of an image box containing the tracked object and Support Vector Machine as a classifier, to classify moving objects in crowded traffic scenes. This method classifies moving objects into three main types of road users: pedestrians, cyclists, and motor vehicles. This is done by first tracking each moving object in the video, classifying its appearance in each frame and then computing the probability of belonging to each class based on its appearance and speed. Bayes’ rule is used to fuse appearance and speed to predict the class for each object. Testing results show good performance, with an overall accuracy of more than 90%.

• Supplemental Notes:
  • This paper was sponsored by TRB committee ABJ35(3) Bicycle and Pedestrian Data.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Zangenehpour, Sohail
  • Miranda-Moreno, Luis
  • Saunier, Nicolas
• 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: 17p
• Monograph Title: TRB 93rd Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Automatic tracking; Bicycle crashes; Classification; Crash data; Crash injuries; Data collection; High risk locations; Highway safety; Histograms; Intersections; Pedestrian vehicle crashes; Video
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Safety and Human Factors; I83: Accidents and the Human Factor;

Filing Info

• Accession Number: 01515753
• Record Type: Publication
• Report/Paper Numbers: 14-4337
• Files: TRIS, TRB, ATRI
• Created Date: Feb 25 2014 9:15AM