Evaluating transportation systems management & operations (TSM&O) benefits to alternative intersection treatments.
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2015-12-01
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Abstract:This research provides a comprehensive review and assessment of current ‘alternative intersection’ methods
which successfully eliminate the left-turn phase. With increasing traffic and limited resources, the Florida
Department of Transportation moves forward with a vision of optimizing intersection control through the
implementation of innovative intersection designs through the Transportation Systems Management &
Operations (TSM&O) program. Because of the specific interest in the integration of alternative intersection
treatments within the State of Florida, this research assessed the operational benefits, challenges, evaluated the
safety implications for bicycles and pedestrians through the alternative intersection methods, and quantified
driver confusion opportunities, maintenance impacts, and comparative cost control measures for benefit-to-cost
ratio development. The operational analysis is based on several case studies presented along with the
advantages and disadvantages of each alternative. The overall analysis provided a variety of parameters that
need to be considered when implementing any of these designs. These intersections can be significantly
cumbersome for vehicles, bicyclists, and pedestrians to navigate without proper implementation of wayfinding
signs and education of the road users. However, when applied properly, the benefits of these designs can save
municipalities years of capacity and preserve the existing infrastructure for a longer period of time. These goals
align with the overall goal of the FDOT TSM&O program.
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