PhD Defense by Aaron Todd Greenwood

Event Details
  • Date/Time:
    • Friday November 13, 2015
      6:30 pm - 8:30 pm
  • Location: Sustainable Education Building, Room 122
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Summary Sentence: Evaluating Comprehension of Temporary Traffic Control

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School of Civil and Environmental Engineering


Ph.D. Thesis Defense Announcement


Evaluating Comprehension of Temporary Traffic Control



Aaron Todd Greenwood



Dr. Michael P. Hunter (CEE)



Committee Members:

Dr. Michael O. Rodgers (CEE), Dr. Gregory M. Corso (PSYC), Dr. Kari E. Watkins (CEE),

Dr. Randall Guensler (CEE)



Date & Time: Friday, 13 November, 2015 at 2:30 PM

Location: Sustainable Education Building, Room 122


There are over five million reported motor vehicle collisions annually in the United States, and while crash rates and fatality rates have declined in the past decades, rates in work zones are disproportionately high. There are strict standards for evaluating the crashworthiness of temporary traffic control devices, but not for evaluating drivers' comprehension of existing or novel device deployments. This dissertation presents a series of three experiments evaluating driver comprehension for existing and novel traffic control devices conducted in a work zone setting. This evaluation is further expanded by decomposing the task of comprehending traffic control into the three subtasks of detection, localization, and identification. Methods are proposed for conducting a computer-based experiment with still image stimuli to measure participant performance at each of these subtasks. Next, procedures for categorizing localization responses and accounting for variation in participants physical responses are explored. Lastly, an application of Item Response Theory toward the evaluation and comparison of participant comprehension is demonstrated. It is hoped that these methods and procedures can be used by future researchers and experimenters to compare novel temporary traffic control devices and systems to inform future design.


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In Campus Calendar

Graduate Studies

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Phd Defense
  • Created By: Tatianna Richardson
  • Workflow Status: Published
  • Created On: Nov 3, 2015 - 4:13am
  • Last Updated: Oct 7, 2016 - 10:14pm