Predicting Performance with Touch Screens to Determine Compliance with the NHTSA Distraction Guidelines

National Highway Transportation Safety Administration's (NHTSA's) visual-manual distraction guidelines specify use of the visual occlusion method, whereby subjects wear a pair of goggles that cycle between being open (seeing the interface) and closed (not seeing the interface but seeing the road) to determine the task time. In an ongoing Advancing Transportation Leadership and Safety (ATLAS) project, this team is improving Pettitt's method, a simple calculation that predicts total occlusion task times using standard times for elements in the Society for Automotive Engineering (SAE) Recommended Practice J2365, such for as pressing an alphabetic button. Unfortunately, J2365 lacks times for touch screen gestures, gestures common to contemporary interfaces. To obtain them and validate J2365, a recently completed experiment (Lin, Green, Kang, Mize, Best, and Su, 2012 - 24 subjects, 14 tasks) involving a pre-production interface will be re-analyzed. Fortunately, the experiment log contains the time of each screen contact and screen update, readily be combined with the video record (more than 24 hours) of what subjects did. Using the prediction equations, the differences between predicted and measured task times, and regression analysis, the computational method and element times will be examined. Subsequently, new standard times will be developed directly from the data each element or prospective element, including touch screen gestures. Using these improvements, new total task time estimates will be calculated and compared the experimental data. The results will be summarized in (1) a revised version of SAE J2365, (2) a technical report and (3) and a journal article, and (4) presented to the SAE Safety and Human Factors Committee. Thus, this research will be conducted by a team highly experienced with visual occlusion research, using existing data, to complete development of a low-cost method codified as an SAE Recommended Practice (being revised by the Project Director), concerning a Department of Transportation (DOT) identified high priority, safety-related topic. This procedure represents a fundamental change in driver interface evaluation.


  • English


  • Status: Completed
  • Funding: $35000.00
  • Contract Numbers:


  • Sponsor Organizations:

    Department of Transportation

    Office of the Assistant Secretary for Research and Technology
    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Performing Organizations:

    University of Michigan, Ann Arbor

    Transportation Research Institute
    Ann Arbor, MI  United States 
  • Principal Investigators:

    Green, Paul

  • Start Date: 20140902
  • Expected Completion Date: 0
  • Actual Completion Date: 20151014
  • Source Data: RiP Project 37106

Subject/Index Terms

Filing Info

  • Accession Number: 01536414
  • Record Type: Research project
  • Source Agency: Center for Advancing Transportation Leadership and Safety (ATLAS Center)
  • Contract Numbers: DTRT13-G-UTC54
  • Files: UTC, RiP
  • Created Date: Aug 31 2014 1:00AM