United States Department of Transportation
i
Noteworthy Practice for South Dakota: HFST for Winter Road Conditions
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2021-01-01
[PDF-804.56 KB]
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Abstract:HFST is a safety countermeasure intended to restore and maintain pavement friction in wet and dry conditions to reduce crashes and is especially effective where there is a history of wet-pavement crashes. While investigating lane departure crashes (RwD), the South Dakota Department of Transportation (SDDOT) found RwD crashes were five times more likely to involve winter road conditions than wet road conditions. In addition, one-third of the lane departure crashes occurred on horizontal curves, even though horizontal curves account for less than 10% of the system. This noteworthy practice showcases how SDDOT experiment HFST to combat winter road conditions and now has adopted HFST as one of the safety countermeasures in their toolbox to reduce winter road related crashes.
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