Best Practices for Road Weather Management Version 2.0
Using Data to Predict Relative Road Safety and Requirements for Road Closures During Severe Winter Weather Condition
This paper presents a framework for a methodology to predict the relative road safety resulting from severe winter weather. Several states in the U.S. have policies that allow the state police and/or state transportation agency to close a roadway when severe weather makes it unsafe. Determining when a highway is unsafe, however, is generally a subjective decision. We present a model that relates visibility and wind speed to crash rates along a segment of interstate highway. The model provides measurable condition parameters that can be used to define when a roadway segment is unsafe, improving the ability to measure and predict when a road closure is warranted.
84th Transportation Research Board (TRB) Annual Meeting, Iowa State University. For an electronic copy of this resource, please direct your request to WeatherFeedback@dot.gov.
Maze, Burchett, Hawkings
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