HUMAN FACTORS and ERGONOMICS

Universal Interarrival Time Distribution Spreadsheets for Freeways in Ohio

These Microsoft Excel Spreadsheets compute the cumulative interarrival time (IAT) distributions for a given hourly traffic volume (number of vehicles per hour per lane) within the specified traffic volume range as discussed in “Approximated Headway Distributions of Free-Flowing Traffic on Ohio Freeways for Work Zone Traffic Simulation” paper presented at the 86^th Annual Meeting of the Transportation Research Board and Published in Transportation Research Record 1999, 2007, pp131-140.

Download Universal IAT Distribution Spreadsheet for 2-Lane Freeways(Size 278 KB)

Download Universal IAT Distribution Spreadsheet for 3-Lane Freeways(Size 396 KB)

Download Universal IAT Distribution Spreadsheet for 4-Lane Freeways(Size 524 KB)

Contact Information

For further information please contact:

Dr. Helmut Zwahlen 
Russ Professor Emeritus of Industrial and Manufacturing Systems Engineering 
Research Professor, Ohio Research Institute for Transportation and the Environment
114 Stocker Center
Ohio University
Athens, OH 45701
(740) 597-1790
(740) 593-2476

orite@bobcat.ent.ohiou.edu
zwahlen@ohio.edu

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