United States Department of Transportation
i
Comprehension and Legibility of Selected Symbol Signs Phase Ⅳ
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2022-09-01
[PDF-3.26 MB]
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Abstract:The traffic control device (TCD) pooled fund study (PFS) addresses human factors and operations issues through the systematic evaluation of existing and new TCDs. As a part of this effort, the Federal Highway Administration Human Factors Team evaluated sets of existing and proposed traffic signs for driver comprehension and legibility. The TCD PFS panel selected the following sign messages for evaluation: Lane Reduction Treatment, Temporary Traffic Control Bicycle/Pedestrian Access, Flashing Yellow Arrow, Alternative Fuels, Midblock Hybrid Beacon Pedestrian Crossings, Passenger Ferry, Bicycle Passing Law, Vehicle Prohibition, Rail/Flangeway Gap Bicycle Warning, Blind Hill Warning, Toll Plaza Electronic Toll Interoperability, and Recreation and Cultural Interest. The research team used open-ended responses, multiple-choice responses, and subjective rankings to assess sign comprehension and then tested the legibility of each sign. The study provides recommendations on the specific signs road users are most able to understand, as well as sign groups for which additional public education and sign testing would be recommended.
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