Improving passing lane safety and efficiency for Alaska's rural non-divided highways.
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2014-06-01
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Abstract:A series of experiments using a fixed-base driving simulator were conducted to examine the potential safety and operational
benefits of several highway safety interventions for reducing collision risk. Our approach sought to go beyond typical mitigations
of collision risk that use explicit behavioral interventions, such as enforcing lower speed limits (regulation) and public education
(safety warnings). Instead, we examined whether semi-permanent alterations to the visual appearance of the unsafe zones
might implicitly reduce risky driver behaviors by slowing traffic and inducing better passing decisions without drivers being
consciously aware that their behavior is being affected.
Such implicit changes in behavior may be more efficient and long-lasting since they do not require conscious compliance from
drivers nor engagement from law enforcement. Taken together, the results of our experiments clearly show that regulatory signs
early in a passing zone that limit the speed of right-lane drivers relative to left-lane drivers offer the greatest opportunity for
increasing the efficiency—and perhaps also the safety—of rural passing zones.
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