VEHICULAR HEADWAY DISTRIBUTIONS: TESTING AND RESULTS

Numerous investigations and studies have been performed concerning the spacings and headways of vehicles in the traffic stream. This paper briefly reviews, examines, and tests some of the mathematical models with real world data collected for both two-lane roadways and urban freeways. These testing methods include both graphical fits and statistical fits, and the results are presented, along with conclusions on the appropriateness of the model representations. The results indicate the composite exponential, Pearson Type III, and log-normal distributions best represent conditions; generally the log-normal distributions are the best for a wide range of traffic volumes.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1976/567/567-006.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=VEHICULAR+HEADWAY+DISTRIBUTIONS%3A+TESTING+AND+RESULTS&author=J.+Tolle&publication_year=1976
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309024803
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Traffic Flow Theory and Characteristics. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Tolle, J E
• Conference:
  • 54th Annual Meeting of the Transportation Research Board
  • Location: Washington District of Columbia
  • Date: 1975-1-13 to 1975-1-17
• Publication Date: 1976

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 56-64
• Monograph Title: Traffic flow theory and applications
• Serial:
  • Transportation Research Record
  • Issue Number: 567
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Data collection; Headways; Mathematical models; Testing; Traffic flow; Two lane highways; Urban highways
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00139876
• Record Type: Publication
• ISBN: 0309024803
• Files: TRIS, TRB
• Created Date: Oct 6 1976 12:00AM