Development of an Algorithm of Automatically Setting Critical Speeds on Urban Expressways

The purpose of this study was to develop an algorithm for automatically setting critical speeds that discriminate in real-time between congested and uncongested traffic flow in road sections of urban expressway networks through the use of traffic detector data. A method of binarizing images was applied to set critical speeds on scatter-grams of traffic volume and speeds in combination with a kind of edge enhancement. This algorithm was evaluated in comparison with an existing one that used the threshold selection method by Otsu. In addition, this algorithm was validated with traffic detector data of the Tokyo Metropolitan Expressway Networks.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References;
  • Pagination: 11p
  • Monograph Title: 18th ITS World Congress, Orlando, 2011. Proceedings

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Filing Info

  • Accession Number: 01487155
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 4 2013 12:19PM