United States Department of Transportation
i
Assessment of the Performance of Vehicular Traffic Signal Assemblies during Hurricane Force Winds
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2019-03-01
[PDF-6.68 MB]
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Edition:Final Report, April 2016 – March 2019
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Abstract:The performance of span-wire mounted traffic signals during past hurricane seasons indicated to FDOT the need to explore new methods to improve traffic signal assembly survivability during hurricane force winds. FDOT and FIU embarked on a collaborative research program to study the performance of span-wire traffic signal systems subjected to extreme winds with the goal to enhance their resiliency and survivability and potentially find a methodology that could be utilized to certify the different products used in span-wire traffic signal assemblies. The current research project served as a companion project to BDV29 TWO 977-20 and added additional full-scale testing cases using a modified (long-span) test frame. The execution of the different tasks generated a plethora of experimentally and numerically derived outcomes. The findings from the current research project are of great value and significance since it was the first time that these systems were tested at full-scale in a controlled and realistic environment. The aerodynamic instability that has been observed in the field was identified and quantified for the very first time in a laboratory setting using both a short- and a long-span test frame. Numerous recommendations have been generated following the findings of this research that will assist FDOT to enhance the survivability of span-wire traffic signals during extreme wind events.
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