Title page for ETD etd-122299-195616

Type of Document Master's Thesis
Author Blanco, Myra
Author's Email Address mblanco@vt.edu
URN etd-122299-195616
Title Effects of In-Vehicle Information Systems (IVIS) Tasks on the Information Processing Demands of a Commercial Vehicle Operations (CVO) Driver
Degree Master of Science
Department Industrial and Systems Engineering
Advisory Committee
Advisor Name Title
Dingus, Thomas A. Committee Chair
Beaton, Robert J. Committee Member
Wierwille, Walter W. Committee Member
  • Advanced Traveler Information System
  • Commercial Vehicle Operations
  • Driving Performance
  • Information Processing
  • In-Vehicle Information Systems
  • Safety
Date of Defense 1999-12-10
Availability unrestricted
This study was performed with two main goals in mind. The first goal was to understand and predict "red-lines" and "yellow-lines" in terms of what the CVO driver can process without hindering the primary task of driving. The second goal was to collect conventional secondary task data for CVO driving performance.

An on-the-road experiment was performed with the help of 12 truck drivers. Type of task, presentation format, information density, and age were the independent variables used in the experiment. The 22 dependent measures collected were grouped into the following categories: eye glance measures, longitudinal driving performance, lateral driving performance, secondary task performance, and subjective assessment.

The findings of this study strongly suggest that paragraphs should not be used under any circumstance to present information to the driver while the vehicle is in motion. On the other hand, the Graphics with Icons represent the most appropriate format in which driving instructions and information should be presented for IVIS/CVO tasks. In order to avoid a high visual attention demand to the driver due to a secondary task, only simple search tasks with the most important information shall be presented. Although the suggested format, type of task, and information density represent a higher visual attention demand than a conventional secondary task, these characteristics seem to bind a task with a moderate attentional demand. Other combinations of format, type of task, and information density will cause an increase in the driver's attentional demand that will consequently deteriorate their driving performance causing unsafe driving situations.

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