Type of Document Master's Thesis Author Collins, Dennis James URN etd-32082539751141 Title An Examination of Driver Performance Under Reduced Visibility Conditions When Using An In-Vehicle Signing Information System (ISIS) Degree Master of Science Department Industrial and Systems Engineering Advisory Committee
Advisor Name Title Neale, Vicki L. Wierwille, Walter W. Dingus, Thomas A. Committee Chair Keywords
- adverse weather
- Driver performance
Date of Defense 1997-04-10 Availability unrestricted AbstractRecent 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
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.
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