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's Winter Maintenance Program. The guidelines are adapted from the Manual of Practice for an Effective Anti-Icing Program 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 guidelines provide operational protocols for applying solid chemical de-icing agents across five distinct weather event scenarios: light snow storms, moderate to heavy snow storms, frost or black ice conditions, freezing rain storms, and sleet storms. For each weather event, the document specifies pavement temperature ranges, maintenance actions, and chemical application rates measured in pounds per lane-mile for both initial operations and subsequent operations. Chemical spread rates vary by temperature and conditions, ranging from 150 to 400 lb/lane-mile depending on weather severity and pavement conditions. The guidelines recommend applying pre-wetted solid chemicals in most scenarios and provide specific instructions for timing applications relative to traffic patterns, precipitation intensity, and pavement moisture levels. Special considerations are noted for temperatures below 15°F, where chemical applications are generally not recommended and abrasives are suggested instead to enhance traction.