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 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 the Corps of Engineers in 1996. The document serves as a technical resource for winter maintenance operations within New Jersey's transportation infrastructure.

The document provides operational guidance for the application of solid chemical de-icers across five weather event scenarios: light snow storms with moderate to heavy snow periods, moderate or heavy snow storms, frost or black ice conditions, freezing rain storms, and sleet storms. For each weather event, the guidelines specify pavement temperature ranges, maintenance actions, and chemical spread rates measured in pounds per lane-mile for both initial and subsequent operations. Chemical application rates vary by temperature and weather conditions, ranging from 150 to 400 lb/lane-mi depending on circumstances. The guidance emphasizes pre-wetting solid chemicals, timing applications to prevent ice and snow bonding, and adjusting application rates based on pavement temperature, precipitation intensity, and traffic volumes. Key operational principles include applying chemicals ahead of traffic rush periods, plowing before chemical applications to remove excess precipitation, and reducing chemical application rates during lighter precipitation or warmer temperatures to minimize environmental impact while maintaining roadway safety.