Highway Traffic Data Sensitivity Analysis

This report is presented in two components. Part I - Highway Traffic Data Sensitivity Analysis in Systems Approach, describes a systems approach used for highway traffic data sensitivity analysis. It examines the input, output, and processes between the input and the output and identifies key factors in the input processes that would affect the output. Part I looks at point estimation error and compares it with ground truth from independent sensors. It divides highway traffic into four phases and selects the most critical one that would affect traffic parameter estimation error. It proposes a new congestion onset detection method, and, it establishes a simple relationship between the upper bound of travel time estimation delay error and sensor density based on the new congestion detection. Part II - Empirical and Analytical Results for Sensitivity to Loop Station Spacing examines the tradeoff in traffic control applications by calculating response time and traveler delay. Specifically, the study investigates how big of an event can be missed and at what cost for a given deployment. Several bottlenecks are examined using real detector data and the effect of detector station spacing is considered. The influence or link assigned to a detector station is examined, with consideration given to different boundary definitions between the links. Costs are presented in terms of time and as a function of spacing.

• Record URL:
  https://merritt.cdlib.org/d/ark%3A%2F13030%2Fm5bk1dgz/2/producer%2FPRR-2007-03.pdf
• 
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/83599797
• Corporate Authors:

  University of California, Berkeley

  California PATH Program, Institute of Transportation Studies
  Richmond Field Station, 1357 South 46th Street
  Richmond, CA  United States  94804-4648

  University of California, Berkeley

  Berkeley, CA  United States  94720-1720

  California Department of Transportation

  1120 N Street
  Sacramento, CA  United States  95814
• Authors:
  • Lu, Xiao-Yun
  • Coifman, Benjamin
• Publication Date: 2007-1

Language

• English

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; References; Tables;
• Pagination: 179p
• Serial:
  • PATH Research Report
  • Publisher: University of California, Berkeley
  • ISSN: 1055-1425

Subject/Index Terms

• TRT Terms: Bottlenecks; Loop detectors; Sensitivity analysis; Spacing; Systems analysis; Traffic congestion; Traffic data; Traffic delays; Traffic estimation; Traffic flow; Vehicle detectors
• Subject Areas: Highways; Operations and Traffic Management; I70: Traffic and Transport;

Filing Info

• Accession Number: 01046844
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Report/Paper Numbers: UCB-ITS-PRR-2007-3
• Contract Numbers: TO 5320
• Files: CALTRANS, TRIS, ATRI, STATEDOT
• Created Date: Apr 16 2007 2:34PM