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Evaluation of One-Way Flagging Operations
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2025-04-01
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[PDF-2.50 MB]
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Edition:Final Oct 2023 to Apr 2025
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Abstract:One-way flagging operations in Utah are a balance between meeting the needs of UDOT and contractors by allowing time and space on the roadway for work to be done, while also meeting the needs of the traveling public. Currently, UDOT predicts queue lengths and travel time for such operations by using traffic models in order to effectively plan and manage one-way flagging operations. While these models help to provide insights into the impact one-way flagging operations will have, it is important to validate them with real world experience. The objective of this research was to establish a more defined and reliable standard for determining appropriate construction times and limitations to minimize traffic delays and increase safety during one-way flagging operations. This was done by evaluating the roadway capacity, queue lengths, and travel times during one-way flagging operations throughout Utah utilizing linear regression and simulation modeling analysis.
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