Winter Highway Maintenance Operations: Connecticut

This study addresses issues identified in legislation adopted by the Connecticut General Assembly that directed the Commissioner of Transportation to conduct an analysis of corrosive effects of chemical road treatments, to determine the cost of corrosion created by road treatments, and to provide an evaluation of alternative techniques and products, such as, but not limited to, rust inhibitors, with a comparison of cost and effectiveness. Primary conclusions of the study include that ensuring the safety and mobility of the traveling public requires the most effective winter highway maintenance practices possible. This is a shared responsibility—to achieve comprehensive and sustainable success, competing factors must be considered including safety, cost, corrosion, operating practices, materials and equipment, environmental and economic impacts, and communication with the general public, stakeholders, and government leaders. Balancing these factors presents a challenge that can be met through ongoing monitoring and continuous improvement based on evolving best practices. While use of chloride-based deicing chemicals for winter highway maintenance has raised concerns regarding impacts on vehicles, infrastructure and the environment, alternative products also have environmental, corrosion and expense impacts. Although corrosion inhibitors are available for use with deicers, evidence of their effectiveness in the field based on literature reviewed was not found. Research is needed to confirm their effectiveness before considering use. Further, the Connecticut Department of Transportation's (CTDOT’s) participation in national initiatives, and ongoing communication with neighboring states, municipalities, and other stakeholders should continue and be strengthened to help balance the competing factors by using the most effective practices.