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 (NJDOT). The guidelines are adapted from the Manual of Practice for an Effective Anti-icing Program originally developed by the Federal Highway Administration (FHWA), US Army Cold Regions Research and Engineering Laboratory, and the Corps of Engineers in 1996. The document serves as a technical standard for the Winter Maintenance Program operated by NJDOT to guide pavement treatment decisions during winter weather events.

The document provides operational guidance for applying solid chemical de-icers and anti-icing agents across five weather scenarios: light snow storms with moderate to heavy snow periods, 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 application rates (measured in pounds per lane-mile), and operational frequencies based on initial and subsequent treatment cycles. Chemical spread rates vary significantly by condition, ranging from 150 to 400 pounds per lane-mile depending on temperature, precipitation intensity, and traffic volume. The guidelines recommend pre-wetted solid chemicals for most conditions above 15°F and identify temperatures below 15°F as unsuitable for chemical application, recommending abrasives for traction instead. Operational guidance emphasizes plowing excess snow or ice before chemical applications and timing treatments to prevent ice bonding and packed snow accumulation during high-traffic periods.