T0777 Attachment 5 - Spreading Services Guide.pdf

This document is a set of Solid Chemical Application Guidelines for the New Jersey Department of Transportation's Winter Maintenance Program. It was adapted 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. The guidelines provide operational standards for the application of solid chemical de-icing agents across New Jersey's transportation infrastructure during winter weather events.

The guidelines establish specific chemical application rates, maintenance procedures, and operational protocols organized by weather event type and pavement temperature conditions. The tables present recommendations for light snow storms, moderate or heavy snow storms, frost or black ice conditions, freezing rain events, and sleet storms, with chemical spread rates ranging from 150 to 400 pounds per lane-mile depending on temperature ranges, precipitation intensity, and pavement surface conditions. Initial operations typically employ solid or pre-wetted solid chemical applications, while subsequent operations may involve liquid or pre-wetted solid chemicals as needed. The guidelines emphasize timing of applications relative to traffic rush periods, plow operations before chemical application to remove excess precipitation, monitoring of pavement temperatures, and adjustment of chemical rates based on temperature fluctuations and precipitation intensity. Below 15°F, the guidelines generally recommend against chemical applications in favor of abrasives to enhance traction on roadways.