T0777 Attachment 5 - Spreading Services Guide.pdf

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

The document provides detailed operational guidance for the application of solid chemical de-icing agents across five 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, and operational procedures differentiated by pavement temperature ranges. Application rates vary significantly based on conditions, ranging from no chemical application in above-32°F conditions to rates between 150 and 400 pounds per lane-mile for moderate to heavy snow events. The guidelines emphasize timing of initial and subsequent applications to prevent deteriorating conditions and recommend applying chemicals ahead of traffic rush periods. Maintenance personnel are instructed to monitor pavement temperatures closely and adjust chemical spread rates and application frequency based on precipitation intensity, pavement conditions, and temperature fluctuations to optimize de-icing effectiveness while managing material usage.