South Dakota Department of Transportation, also known as SDDOT, is a state-owned entity headquartered in the US. Established in 1917, the organization operates with approximately 160 employees and reported $16.9M in revenue as of 2023. The department is responsible for planning, constructing, and maintaining safe and efficient public transportation infrastructure. It manages 7,830 miles of state highways, including bridges and related infrastructure, with a focus on safety and supporting economic development.