A Cognitive Engineering Approach to Improving Signalized Left Turn Intersections

Abstract

This research evaluated the effect of providing advanced left turn information to individuals faced with deciding whether or not it is safe to turn at a signalized intersection. Younger (mean age 37 years) and older (mean age 71 years) drivers were tested in simulations of approaching an intersection with and without advanced cueing. Experiment 1 used a featureless background; Experiment 2 used an animated presentation of traffic control displays. In both experiments the subjects had to determine whether or not they had right-of-way to make a left turn. Exaggerated error rates and increased decision latencies for displays conveying unprotected turn status occurred in both studies. Cueing drivers with advanced notice of the decision rule through a redundant upstream posting of sign elements improved both accuracy and latency of younger and older drivers′ decisions.

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References

Fell, J. C. (1976). A motor vehicle accident causal system: The human element. Human Factors, 18, 85–94.

Fisk, A. D. , and Rogers, W. A. (1991). Toward an understanding of age-related memory and visual search effects: Why older adults are deficient in automatic process development. Journal of Experimental Psychology: General, 120, 131–149.

Hertzog, C. (1989). Influences of cognitive slowing on age differences in intelligence. Developmental Psychology, 25, 636–651.

Rogers, W. A. , and Fisk, A. D. (1991). Age-related differences in the maintenance and modification of automatic processes: Arithmetic Stroop interference. Human Factors, 33, 45–56.

Salthouse, T. A. (1990). Working memory as a processing resource in cognitive aging. Developmental Review, 10, 101–124.

Staplin, L. (1990). Diminished driver capability and the use of traffic control devices (Report FHWA/RD-90/061). Washington, DC: U.S. Department of Transportation.

Staplin, L., and Lyles, R. (in press). Age differences in specific traffic maneuver problems. Transportation Research Record.

U.S. Department of Transportation/Federal Highway Administration . (1988). Manual on uniform traffic control devices (MUTCD). Washington, DC: Author