South Dakota Department of Transportation (SDDOT)

The South Dakota Department of Transportation (SDDOT) manages over 8,000 miles of state highways through a largely rural state that is a critical transit corridor for northern Great Plains freight. Key routes include I-90 (a major east-west transcontinental freight highway) and I-29 (connecting Canada to the Midwest along the Missouri River). South Dakota's agricultural economy generates significant freight volumes from grain, cattle, and hog production. SDDOT administers commercial vehicle permits, manages seasonal weight restrictions critical during spring thaw, and provides 511 South Dakota for road conditions. The department also manages access to major tourist attractions including Mount Rushmore, which generates significant seasonal traffic.

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• @SouthDakotaDOT — SDDOT