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Abstract:As expected, most state and provincial DOTs that we spoke with are using traditional methods to prevent and
remove snow and ice at very low temperatures. In addition to a review of current research, we spoke with six winter
maintenance professionals at state and provincial DOTs with cold climates, including Maine, Ontario, Alberta and
Manitoba.
The most innovative strategy in use among these agencies is the hot-water sand spreader being tested by the Ontario
Ministry of Transportation. Originally developed in Europe, the spreader delivers sand that is prewetted with hot
water (about 200 F). This technology is designed to keep sand on the road for much longer than conventional sand
spreading techniques.
Norway has also tested the use of hot water as a prewetting agent for salt, and one article about this research noted
that testing was planned to assess how this technique affects the temperature limits of salt application.
Other strategies identified that may be less common include constructing snow ridges rather than snow fences to
control blowing and drifting; and for areas where snow storage is required, use of an in-traffic loading technique that
minimizes lane closures.
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