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TRANSPORTATION RESEARCH DIGEST

ARIZONA TRANSPORTATION INSTITUTE

e-mail jsemmens@cox.net

NOVEMBER 2005

weather conditions, pavement conditions, and available resources of the moment. Weather and pavement conditions are continually changing and may require tactical adjustments. LOS goals may be changing with the time of day and pavement conditions. Available resources may be changing with equipment breakdowns and mandatory personnel rest periods.

The actual formula or process for making wise and appropriate treatment decisions is simple. It involves using timely information on weather and pavement conditions plus having an understanding of the LOS goals and capabilities of available resources. These resources include snow and ice control strategies and tactics, materials, equipment, and manpower.

TABLE 7 Strategies and tactics and LOS expectations

Strategies and Tactics

Within-event LOS

After-event LOS

Low

Medium

High

Low

Medium

High

Anti-icing

X

X

Deicing

X

X

X

X

Mechanical

X

X

Mechanical and Abrasives

X

X

Mechanical and Anti-icing

X

X

Mechanical and Deicing

X

X

X

X

Mechanical and Prewetted Abrasives

X

X

Anti-icing for Frost/Black Ice/Icing Protection

X

X

Mechanical and Abrasives Containing> 100 lb/LM of Chemical

X

X

X

X

X

X

Chemical Treatment Before or Early in Event, Mechanical Removal During Event, and Deicing at End of Event

X

X

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