00095726

Component

http://onlinepubs.trb.org...s/trr/1974/520/520-003.pdf

http://scholar.google.com...nian&publication_year=1974

Theoretical and experimental investigations were conducted of automobile path deviations when a driver is attempting to steer his vehicle along a straight path with his vision occluded. A three-factor (car, subject, speed), tow-level field experiment was carried out to test for main and interaction effects. Another field experiment was carried out to determine the effects of no steering control. In both experiments, the vehicle path deviations from the theoretical straight path were measured over several hundred feet and were used as the dependent variable. Both experiments were conducted on a flat airport runway under daylight and no-wind conditions. The experimental results indicate no significant car or subject effects but a highly significant speed effect and a significant car-subject interaction. Specifically, the standard deviations of the vehicle displacements from the theoretical straight path are considerably smaller at the higher speed for a given distance traveled under occluded vision. Further, the standard deviations of vehicle displacements for a given distance traveled are considerably larger for the no steering control condition than for the steering control condition with no visual input. The experimentally obtained data seem in basic agreement with the theoretical path deviation model. Based on the experimental data, the distribution of vehicle displacements for a given distance traveled under no visual input could be reasonably approximated by a normal distribution.

Publication of this paper sponsored by Committee on Road User Characteristics. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01411385

Weir, David H

pp 25-37

1974

Transportation Research Record

53rd Annual Meeting of the Highway Research Board

0309023653

Digital/other

Figures (10) ; References (6)

Dislocation (Geology); Driver performance; Drivers; Field tests; Normal distributions; Personnel performance; Speed; Standard deviation; Steering; Vehicle dynamics; Visual perception

Vehicle path

Highways; Safety and Human Factors

TRIS, TRB

Jul 2 1975 12:00AM

• DRIVER-VEHICLE CONTROL AND PERFORMANCE IN THE PRESENCE OF AERODYNAMIC DISTURBANCES FROM LARGE VEHICLES
• EFFECTS OF CARBON MONOXIDE INTOXICATION ON DRIVING TASKS
• TRENDS IN BLOOD ALCOHOL CONCENTRATION LEVELS OF NIGHT DRIVERS