T0777 Attachment 5 - Spreading Services Guide.pdf

This document is the Solid Chemical Application Guidelines for an Effective Anti-icing Program issued by the New Jersey Department of Transportation. The guidelines were modified from the Manual of Practice for an Effective Anti-Icing Program originally prepared by the Federal Highway Administration (FHWA) and the US Army Cold Regions Research and Engineering Laboratory, Corps of Engineers in 1996. This guidance applies to the New Jersey Department of Transportation's Winter Maintenance Program.

The document provides operational guidance for applying solid chemical de-icers across five weather event scenarios: light snow storms, moderate or heavy snow storms, frost or black ice conditions, freezing rain storms, and sleet storms. For each weather condition, the guidelines specify chemical application rates measured in pounds per lane-mile (lb/lane-mi), maintenance actions, and pavement treatment protocols based on temperature ranges and pavement surface conditions. Chemical spread rates vary by weather event and temperature, ranging from 150 to 400 lb/lane-mi for initial operations and 150 to 350 lb/lane-mi for subsequent operations. The guidance emphasizes proactive pre-wetting of solid chemicals, strategic timing of applications ahead of traffic rush periods, and adjusting application frequencies and rates based on precipitation intensity, pavement temperature, and moisture conditions to prevent ice and bonded snow formation while maintaining safe road surfaces.