Comparative study of type 2 median crossovers and median u-turns

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Comparative study of type 2 median crossovers and median u-turns

Please use this identifier to cite or link to this item: http://hdl.handle.net/10355/5676

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dc.contributor.advisor Virkler, Mark Robert en_US
dc.contributor.author Boddapati, Pavani en_US
dc.date.accessioned 2010-02-23T17:13:55Z
dc.date.available 2010-02-23T17:13:55Z
dc.date.issued 2008 en_US
dc.date.submitted 2008 Summer en
dc.identifier.other BoddapatiP-072908-T11474 en_US
dc.identifier.uri http://hdl.handle.net/10355/5676
dc.description The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. en_US
dc.description Title from title screen of research.pdf file (viewed on August 10, 2009) en_US
dc.description Includes bibliographical references. en_US
dc.description Thesis (M.S.) University of Missouri-Columbia 2008. en_US
dc.description Dissertations, Academic -- University of Missouri--Columbia -- Civil engineering. en_US
dc.description.abstract Many states use rural expressway median crossovers which provide for separation between the two opposing traffic lanes to manage the direct left turn movements between the expressways and cross roads. As the volume increases on the major road, the traffic from the crossroad faces difficulty in finding a gap to enter the other side of the driveway which results in long travel and delay times. Sometimes the storage length provided for the expressway vehicles to make a left turn at the median crossover may get occupied completely and the vehicles may extend back creating a dangerous situation. The research describes the comparative study of type 2 median crossovers and Median U-Turns and estimates where the rural expressway Type 2 median crossover fails in its operation. The Highway Capacity Software and VISSIM, the simulation tool, were used to obtain the performance characteristics of the median crossover based on operational parameters including travel time, delay time and Level of service. A design tool was developed that helps to make a decision on the distance required to be provided between the crossroad and the Median U-Turn. This design tool is based on the volume combinations of the crossroad and the major road. Various combinations of traffic volumes have been assumed based on which, the extent to which the conventional design option, the Median U-Turn with unsignalized condition and signalized condition will work were determined from the performance measures obtained in VISSIM. Cost estimates that include the construction costs and user costs have been made for all the three design options. en_US
dc.language.iso en_US en_US
dc.publisher University of Missouri--Columbia en_US
dc.relation.ispartof 2008 Freely available theses (MU) en_US
dc.subject.lcsh Median strips en_US
dc.subject.lcsh Roads -- Interchanges and intersections -- Safety measures en_US
dc.subject.lcsh Roads -- Design and construction en_US
dc.subject.lcsh Traffic engineering en_US
dc.title Comparative study of type 2 median crossovers and median u-turns en_US
dc.type Thesis en_US
thesis.degree.discipline Civil engineering en_US
thesis.degree.grantor University of Missouri--Columbia en_US
thesis.degree.name M.S. en_US
thesis.degree.level Masters en_US
dc.identifier.merlin .b7061524x en_US
dc.identifier.oclc 429908757 en_US
dc.relation.ispartofcommunity University of Missouri-Columbia. Graduate School. Theses and Dissertations. Theses. 2008 Theses


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