Crash Warning Interface Metrics Task 3 Report: Empirical Studies of Effects of DVI Variability

This report documents the methods and findings of Task 3 under the project “Crash Warning Interface Metrics (CWIM).” The CWIM project has the objective of examining the potential advantages and concerns of Advanced Crash Warning Systems (ACWS), with a particular focus on the driver-vehicle interface (DVI). Task 3 involved new empirical research to address issues of DVI variability for ACWS systems across vehicles. Two experiments were performed. Experiment 1 addressed whether driver response to a forward collision warning (FCW) acoustic alert suffered when the participant switched from a vehicle with one acoustic alert to a different vehicle with a different acoustic alert. After the alert was switched, participants displayed substantially delayed brake reaction times, particularly in one direction of shift. This comparison provides some evidence of a potential negative transfer effect. Experiment 2 investigated whether people who are unfamiliar with ACWS features were able to identify and comprehend status displays for a variety of existing ACWS. Overall, individuals were not particularly accurate in assessing whether an advanced crash warning system was present (more than 40% of these responses were incorrect), but participants were nonetheless confident in their responses. A degree of familiarity with an ACWS (from reading owner’s manual materials) improved comprehension slightly, but there was no finding of a systematic trend toward either positive or negative transfer. The final section of the report discusses methodological assessments and implications for each experiment.


  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Figures; References; Tables;
  • Pagination: 72p

Subject/Index Terms

Filing Info

  • Accession Number: 01357943
  • Record Type: Publication
  • Report/Paper Numbers: HS-811 470b
  • Files: HSL, TRIS, USDOT
  • Created Date: Nov 10 2011 11:53AM