INTRODUCTION TO ANTI-ICING

Application of a chemical freeze-point depressant onto the pavement at the start of a winter storm or even prior to the beginning of precipitation, inhibits the development of a bond between the snow and ice at the pavement surface. Furthermore, moderate and periodic reapplication of the chemical during the storm can continue this effect. Such preventive operations are the core of an ANTI-ICING program.

ANTI-ICING is the snow and ice control practice of "preventing" the formation or development of bonded snow and ice by timely applications of a chemical freeze-point depressant. It provides us with two major capabilities: the capability of maintaining roads in the best condition possible during a winter storm, and the capability to do so in an efficient manner. As a consequence, ANTI-ICING has the potential to provide the benefit of increased traffic safety at the lowest cost. However, to achieve this we must adopt a systematic approach to snow and ice control and must ensure that the performance of the operations is consistent with the objective of preventing the formation or development of bonded snow and ice. Such an approach requires the use of considerable judgement in making decisions, utilizing available information sources methodically and the operations be anticipatory or prompt in nature.

ANTI-ICING is not a new technology as it is being used in parts of Asia, Europe, United States and now in Canada. In our ever changing and fragile environment we need to seriously look at alternative methods of winter road maintenance. Sand and salt are no longer the "best" methods. ANTI-ICING will not only alleviate the environmental stresses of sand and salt it can also reduce the number of motor vehicle accidents and lower winter maintenance costs. Also, the appropriate use of remote weather stations and pavement sensors is beneficial to the road contractors and general public.

The following information has been complied by various Ministries, Departments of Transportation (U.S.), European Countries, the City of Kamloops and ICBC. This is a brief outline of the positive effects of ANT-ICING.

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