T0777 Attachment 5 - Spreading Services Guide.pdf

This document is a Solid Chemical Application Guidelines manual prepared by the New Jersey Department of Transportation for its Winter Maintenance Program. The guidelines are based on the Manual of Practice for an Effective Anti-Icing Program developed by the Federal Highway Administration (FHWA) and the US Army Cold Regions Research and Engineering Laboratory, Corps of Engineers in 1996.

The document provides operational guidance for applying solid chemical de-icing agents across multiple weather scenarios, including 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, chemical spread rates measured in pounds per lane-mile, and operational considerations. Chemical spread rates vary by weather condition and temperature, ranging from 150 to 400 pounds per lane-mile for initial operations and 150 to 350 pounds per lane-mile for subsequent operations. Initial operations typically utilize pre-wetted solid chemicals applied ahead of precipitation, while subsequent operations employ either liquid or pre-wetted solid chemical applications as needed. The guidelines emphasize timing chemical applications to prevent deteriorating conditions and packed snow development, coordinating applications with plowing operations to ensure excess snow removal before treatment, and applying chemicals ahead of traffic rush periods. Below 15°F, the guidelines recommend against chemical application in favor of abrasives for enhanced traction.