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Modeling the Macroscopic Effects of Winter Maintenance Operations on Traffic Mobility on Washington Highways
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2019-09-01
[PDF-2.01 MB]
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Edition:Final Report
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Abstract:The Washington State Department of Transportation (WSDOT) maintains a network of more than 7,000 miles of state highways, which contributes to the economic competitiveness of the State, the region, and the nation. Winter weather tends to reduce both the average traffic speed and traffic volume, whereas the implementation of winter road maintenance (WRM) operations tends to mitigate such reductions. Yet, research is currently lacking in understanding the relationship between highway mobility and WRM operations, especially when it comes to the specific road weather scenarios in the Pacific Northwest. The objective of this project is to model the macroscopic effects of winter maintenance current practices on traffic mobility on Washington highways. In other words, the focus is placed on the aggregated outcome of winter weather and WSDOT winter maintenance practices on the parameters characteristic of traffic operations, instead of the microscopic effects or changes in individual driver behaviors. To meet this goal, the following objectives are addressed: (1) identifying appropriate WSDOT highway segments for this modeling study and collecting the relevant data related to winter maintenance practices and climatic conditions; (2) collecting sensor data at the selected WSDOT highway segments to characterize the changes in traffic patterns on winter pavements; and (3) developing a data model that correlates the traffic mobility (aggregated measures) and explanatory variables.
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