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- W243463102 abstract "Traffic safety problems have continued over the past century, causing enormous economic and social cost. Traffic accidents have been a serious concern for transportation planners and engineers. Traffic conflicts which cause accidents often happen at road intersections where drivers are required to perform more driving maneuvers within a shorter time period than are necessary on roadway segments between intersections. Unsignalized intersections are complex to analyze because their capacity and delay depend on driver, vehicle, roadway characteristics and environmental conditions. Improving the design and operation of unsignalized intersections can reduce user cost in delays and accidents. Improvement in design and operation largely depend on applying the suitable access management techniques. The majority of access-related crashes have been attributed to left-turn movements. The safety benefits of access management techniques have been attributed to reduction in traffic conflict points, improved access design, and higher driver response time to potential conflicts. At unsignalized intersections, left turn movements from a driveway to a major road pose many problems and a large number of conflict points. According to the roadway safety and operations problem, specific access management treatments are applied according to many variables such as location, volume, speed, geometric design and land use. Median treatments are the most important techniques that can improve safety at unsignalized intersections. The main goal of this study was to design a guideline for the full opening median treatment at an unsignalized intersection using the predicted conflict rate as the safety measure. As a conclusion three guideline charts were created for three different major road volumes. Those guidelines can be easily used, and then transportation planners and engineers can make the right decision concerning when and what kind of median treatment should be applied." @default.
- W243463102 created "2016-06-24" @default.
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- W243463102 date "2011-01-01" @default.
- W243463102 modified "2023-09-24" @default.
- W243463102 title "Guidelines for Median Treatment at Urban Roadways to Solve Left-Turn Movement" @default.
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- W243463102 hasPublicationYear "2011" @default.
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