A decision support tool for selecting traffic control devices.
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2015-07-01
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Abstract:The Federal Highway Administration (FHWA) and transportation profession continue updating and ; publishing the Manual on Uniform Traffic Control Devices (MUTCD). However, it is beyond the scope of ; the MUTCD to provide the breadth of knowledge necessary for evaluating traffic control devices (TCDs) ; as part of the larger transportation system. In this report, researchers use existing theory and a survey of ; transportation professionals to develop a decision support tool for use in selecting TCDs. To accomplish ; this, researchers first use a survey of transportation professionals to evaluate the relative importance of ; safety, mobility, environmental sustainability, and economic activity when selecting TCDs. This ; investigation leads researchers to conclude that the best solution meets local needs and desires, conforms to ; engineering principles and practice, and provides an engineering benefit. Additionally, this investigation ; finds that safety and mobility are the engineering benefits driving the selection of TCDs. Next, researchers ; use a portion of the same survey of transportation professionals to evaluate the importance of crashes, ; driver compliance, and mobility when ranking transportation alternatives. This investigation finds that ; compliance is a reasonable surrogate measure of safety in the absence of crash data. Additionally, within ; this evaluation, researchers identify performance measures for use in selecting traffic control devices. ; Finally, researchers use the relative importance of agency objectives evaluation and the identified ; performance measures to develop a decision support tool for use in selecting TCDs. Researchers ; demonstrate the use of this decision support tool with a case study.
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Main Document Checksum:urn:sha256:ab9220f11f8e68c5ebcc55b486d55b5bfe9f9dcb584f29721997037e8c11662e