Lane Line Markings in Advance of Lane-Reduction Transitions
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2022-12-01
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Edition:Final Report
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Abstract:Roadway lane-reduction transitions have long been reported to be problematic to drivers. Whether this problem is the result of a lack of understanding of lane-reduction signing or lane markings, a simple failure to comply with such markings, or other unidentified factors is unknown. This study, completed in 2016, explored driver comprehension of six different lane-reduction markings. The markings varied in terms of the incorporation and length of dotted and broken lines. In addition, half of the markings included a solid white line adjacent to the dotted/broken line. The supplemental solid white line resulted in improved understanding that the rightmost lane would end, earlier reported lane changes, and the highest preference ratings. Dotted lines also resulted in better understanding of an upcoming necessary lane change than did the longer, more traditional broken lane lines. This study contains recommendations and suggestions for lane-reduction marking changes to the Manual on Uniform Traffic Control Devices.
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