Specifications include, but are not limited to: Winter maintenance is one of the most important activities performed by the South Dakota Department of Transportation. SDDOT’s Snow and Ice Control Performance Standard defines priorities and operational procedures for plowing, sanding, and chemical application needed to provide a safe and reliable highway system. Research Objectives: 1) Assess purposes for which level of service definitions are and could be used by SDDOT and highway users. 2) Develop winter maintenance level of service definitions that address the needs of SDDOT and highway users. 3) Define and calculate winter maintenance performance measures based upon the level of service definitions. 4) Update the SDDOT Snow and Ice Control performance standard to address department capabilities and customer expectations. 5) Recommend technology-based systems that would simplify collection of data and improve the accuracy of winter maintenance performance measures.