T0777 Attachment 5 - Spreading Services Guide.pdf

This document is the Solid Chemical Application Guidelines for an Effective Anti-icing Program developed by the New Jersey Department of Transportation for its Winter Maintenance Program. The guidelines are adapted from the Manual of Practice for an Effective Anti-Icing Program prepared by the Federal Highway Administration (FHWA), US Army Cold Regions Research and Engineering Laboratory, and Corps of Engineers in 1996.

The document provides operational guidance for the application of solid chemical de-icing agents across five different winter weather scenarios: light snow storms, moderate or heavy snow storms, frost or black ice conditions, freezing rain storms, and sleet storms. For each weather event, the guidelines specify chemical application rates measured in pounds per lane-mile, maintenance actions, pavement temperature ranges, and operational timing. Chemical spread rates vary by weather condition and temperature, ranging from 150 to 400 pounds per lane-mile for initial operations and 150 to 350 pounds per lane-mile for subsequent operations. The guidelines emphasize pre-wetting solid chemicals when pavement temperatures are above 15°F and recommend applying chemicals ahead of traffic rush periods. Below 15°F, the guidelines recommend using abrasives rather than chemicals. The document includes monitoring recommendations, frequency of chemical reapplication, and adjustments based on precipitation intensity and pavement conditions to optimize anti-icing effectiveness while managing chemical usage.