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 as part of its Winter Maintenance Program. The guidelines are based on standards originally developed by the Federal Highway Administration (FHWA) and the U.S. Army Cold Regions Research and Engineering Laboratory, Corps of Engineers in 1996.

The document provides operational protocols for the application of solid chemical de-icers across five distinct 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 type, the guidelines specify pavement temperature ranges, initial and subsequent maintenance actions, chemical application rates measured in pounds per lane mile, and operational recommendations. Chemical application rates vary based on temperature and weather conditions, ranging from 150 to 400 pounds per lane mile across different scenarios. The guidelines recommend pre-wetted solid chemicals as the primary treatment method, with specific adjustments to application frequency and rates based on pavement temperature, precipitation intensity, traffic volume, and moisture conditions. Notably, the guidelines recommend against chemical applications below 15°F, instead recommending abrasive materials to enhance traction in these extreme cold conditions.