Summary

This document is the Solid Chemical Application Guidelines for an Effective Anti-icing Program developed by the New Jersey Department of Transportation (NJDOT) for its Winter Maintenance Program. The guidelines were adapted from the Manual of Practice for an Effective Anti-icing Program originally prepared by the Federal Highway Administration (FHWA) and the U.S. Army Cold Regions Research and Engineering Laboratory, Corps of Engineers in 1996. This technical guidance applies to New Jersey's roadway maintenance operations during winter weather events.

The document provides detailed operational protocols for the application of solid chemical de-icers across five distinct 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 pavement temperature ranges, maintenance actions, and chemical spread rates measured in pounds per lane-mile (lb/lane-mi) for both initial and subsequent operations. Chemical spread rates vary by condition and temperature, ranging from 150 to 400 lb/lane-mi, with pre-wetted and solid chemical applications recommended at different stages. The guidance emphasizes timing of applications relative to traffic patterns, continuous monitoring of pavement conditions, and adjustment of application rates based on precipitation intensity and temperature fluctuations. Critical operational principles include applying chemicals ahead of traffic rush periods, plowing before chemical applications to remove excess accumulation, and limiting chemical applications below 15°F in favor of abrasive materials for enhanced traction.