Approximated Headway Distributions of Free-Flowing Traffic on Ohio Freeways for Work Zone Traffic Simulations

Headway or interarrival time (IAT) data of successive vehicles in free-flowing traffic ahead of work zones for each lane on six different Ohio freeways (two with two lanes in one direction, three with three lanes, and one with four lanes) for 3 days were measured and analyzed. Approximated IAT distributions were generated as a function of the traffic volume for each lane, and relationships between traffic volumes and approximate cumulative IAT distributions were established; this allowed a direct conversion from hourly traffic counts to corresponding cumulative IAT distributions. On the basis of the validation of these IAT distributions with IAT data collected in an independent study, this conversion method produces fairly accurate cumulative IAT distributions for selected hourly traffic volumes. A set of cumulative IAT distribution spreadsheets may be downloaded at webce.ent.ohiou.edu/orite/cumulativeIATdistributions.html. It was also found that the same approximated cumulative IAT distribution can be used to model and simulate free-flowing traffic at other freeway locations in Ohio. It is not known whether these universal approximated IAT distributions would apply for freeways in other states.

• Record URL:
  • https://doi.org/10.3141/1999-14
• 
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=Approximated+Headway+Distributions+of+Free-Flowing+Traffic+on+Ohio+Freeways+for+Work+Zone+Traffic+Simulations&author=H.+Zwahlen&author=E.+Oner&author=K.+Suravaram&publication_year=2007
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780309104258
• Authors:
  • Zwahlen, Helmut T
  • Oner, Erdinc
  • Suravaram, Kiran
• Publication Date: 2007

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 131-140
• Monograph Title: Traffic Flow Theory 2007
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 1999
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Data collection; Freeways; Headways; Highway operations; Spreadsheets; Traffic distribution; Traffic flow; Traffic flow theory; Traffic simulation; Traffic volume; Work zones
• Uncontrolled Terms: Free flow (Traffic); Headway distribution; Vehicle interarrival time
• Geographic Terms: Ohio
• Subject Areas: Highways; Operations and Traffic Management; I71: Traffic Theory;

Filing Info

• Accession Number: 01049371
• Record Type: Publication
• ISBN: 9780309104258
• Files: TRIS, TRB, ATRI
• Created Date: May 9 2007 7:47AM