Scholarly Communications Project


AN EXAMINATION OF DRIVER PERFORMANCE UNDER REDUCED VISIBILITY CONDITIONS WHEN USING AN IN-VEHICLE SIGNING INFORMATION SYSTEM (ISIS)

by

Dennis James Collins

Master's Thesis submitted to the Faculty of the Virginia Tech in partial fulfillment of the requirements for the degree of

Master of Science

in

Industrial and Systems Engineering

Approved

Thomas A. Dingus, Chair
Walter W. Wierwille
Vicki L. Neale

April 10, 1997
Blacksburg, Virginia


Abstract

     Recent technological innovations and the need for increased
safety on the world's roads have led to the introduction of In-
Vehicle Information Systems (IVIS).  These systems will provide 
navigation and advisory information to drivers while they are 
driving.  One aspect of these systems, In-vehicle Signing 
Information Systems (ISIS), would provide the warning, regulatory, 
and advisory information that is currently found on road signs.
These systems may be of particular benefit when external elements 
such as rain, snow, or night driving reduce or eliminate the 
opportunity for drivers to detect road signs.  This study attempts 
to determine what benefits, if any, are realized by drivers using 
this system.
	Fifty-eight drivers operated an instrumented Oldsmobile 
Aurora under eight conditions.  The eight conditions consisted of a 
daylight-clear weather-ISIS condition, a daylight-clear weather-No 
ISIS condition, a daylight-rain-ISIS condition, a daylight-rain-No 
ISIS condition, a night-clear weather-ISIS condition, a night-clear 
weather-No ISIS condition, a night-rain-ISIS condition, and a 
night-rain-No ISIS condition.  Younger drivers (18-30 years old) and
older drivers (65 years or older) took part in this study.
	Three measures of driver performance were collected along 
with subjective preference data.  Each measure was evaluated in 
order to determine what impact, if any, weather, time of day, age, 
and ISIS use had on performance.  Subjective data was evaluated to 
determine driver preference and acceptance of the ISIS display.
	The results indicated that use of the ISIS display led to 
reduced speeds and greater reaction distances for all drivers.  
Evidence was found that seems to indicate that older drivers may 
receive a greater benefit in complex, unfamiliar, or low visibility 
situations.  Evidence was also found that indicates that all drivers
may receive a greater benefit at night for the complex or unfamiliar
situations.  Subjectively, the majority of the drivers indicated
that the ISIS display made them more aware of road sign information.

Full text (PDF) 1,603,479 Bytes


The author grants to Virginia Tech or its agents the right to archive and display their thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. The author retains all proprietary rights, such as patent rights. The author also retains the right to use in future works (such as articles or books) all or part of this thesis or dissertation.
[ETD main page] [Search ETDs][etd.vt.edu] [SCP home page] [library home page]

Send Suggestions or Comments to webmaster@scholar.lib.vt.edu