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• • Befo laQ Stomr..rm___ ANTI-ICING Anti-icing is often the most cost - effective and environmental- ly safe practice in certain winter road maintenance situations. You should consider heading in this direction. Anti- icing —a proactive approach — should be first in a series of strategies for most winter storms. By applying chemical freezing - point - depressant materials before a storm, you can prevent snow and ice from bonding to the pavement. Anti-icing requires about 1/4 the material of deicing at 1/2o the overall cost, making it the least expensive option for improv- ing traffic safety. Anti-icing is effective and cost - efficient when used correctly and approached with realistic expectations. Guidelines for anti -icing • Anti-icing is often effective for heavy frosts. • Anti-icing works best when combined with accurate road weather information. • Early application is particularly important for frost or light freezing drizzle. • Liquids are the most efficient and may be applied days in advance of an event. • Pretreated salts will work at lower applications (lowest possible setting, less than 100 lbs /two -lane mile) closer to the expected event. • See the Application Rate Guidelines on page 16 of this field handbook. What to do • Apply only with stream nozzles to maintain some bare pavement between sprayed areas to reduce slipperiness. Fan spray is not recommended. • Schedule applications on bridge decks and critical areas if temperature and conditions could produce frost or black ice. • Consider spot- applications on hills, curves, and intersec- tions if predicted conditions warrant. • Use appropriate chemical for your pavement temperature range. See the chart on page 19 of this field handbook. 5 s4 Anti -icing can reduce airbome dust and salt particulates. D a m s 0 D co a