Title page for ETD etd-32082539751141

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
  • adverse weather
  • ISIS
  • Driver performance
Date of Defense 1997-04-10
Availability unrestricted
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.

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