SPEED ESTIMATION TECHNIQUES FOR PLANNING APPLICATIONS

This paper presents speed/travel time estimation techniques developed through the NCHRP 7-13 study "Quantifying Congestion" using empirical field data. The estimation procedures use readily available roadway inventory and traffic volume data. A methodology developed for freeways uses average daily traffic (ADT) volumes per lane and access point frequency as a simple predictor of speeds. The queueing effects of bottlenecks can also be incorporated into the predictive model to account for sections upstream of geometric bottlenecks or congestion points. An estimation procedure for arterial streets relies on ADT per lane and signal density to estimate speeds. The paper also describes how congestion estimates can be combined with data collection to quantify congestion for future conditions.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0784402434
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Turner, S M
  • Levinson, H S
  • Lomax, T J
• Conference:
  • Traffic Congestion and Traffic Safety in the 21st Century: Challenges, Innovations, and Opportunities
  • Location: Chicago, Illinois
  • Date: 1997-6-8 to 1997-6-11
• Publication Date: 1997

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 173-179

Subject/Index Terms

• TRT Terms: Average daily traffic; Bottlenecks; Equations; Estimating; Estimation theory; Field studies; Freeways; Mathematical models; Quantitative analysis; Queuing; Traffic congestion; Traffic speed; Travel time
• Uncontrolled Terms: Field data; Quantifying
• Subject Areas: Highways; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00739687
• Record Type: Publication
• ISBN: 0784402434
• Files: TRIS
• Created Date: Aug 11 1997 12:00AM