Problem
Progressively, winter maintenance strategies have been shifting to include salt brine as part of the standard anti-icing / deicing process. Studies have successfully shown the benefit of using salt brine, usually in terms of cost savings and environmental improvement, but public perception exists that salt brine use is less efficient and less safe for the traveling public compared to traditional use of granular salt.
Objectives
The goal of this project was to collect and synthesize available information about the differences between the Direct Liquid Application (DLA) of salt brine (mixed with any one of up to three different additives applied as recommended depending on the situation) and the application of granular salt as reflected in various performance and safety metrics.
Results
Project findings identified performance measures for the DLA of salt brine as compared to the application of granular salt. These measures focused on impacts to the traveling public and included air / pavement temperature, time to bare / wet pavement, friction / grip rating, speed recovery and other safety-related measures. In addition to a report, two one-page infographics that provide a visually compelling, concise presentation of key project findings were produced.