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On July 19, 2025, the South Dakota Department of Transportation (SDDOT) revealed plans for several major infrastructure projects aimed at improving the state's roadways and transportation system. The announcement comes as part of the department's ongoing efforts to enhance safety, reduce congestion, and support economic growth in the region.One of the key projects outlined by the SDDOT is the expansion and modernization of Interstate 90, a crucial east-west corridor that serves as a major transportation artery for the state. The proposed upgrades include widening existing lanes, improving interchange ramps, and implementing advanced traffic management systems to better handle the increasing volume of vehicles.In addition to the improvements on Interstate 90, the SDDOT also unveiled plans for the construction of a new bypass around the city of Rapid City. The bypass is expected to alleviate traffic congestion in the area and provide a more efficient route for drivers traveling through the region. The project is set to begin construction in the coming months and is slated for completion by 2028.Furthermore, the SDDOT announced a series of bridge rehabilitation projects across the state, aimed at enhancing the safety and longevity of aging infrastructure. The department has allocated significant funding for the repair and maintenance of bridges that are considered structurally deficient or functionally obsolete, ensuring that these vital components of the transportation network remain in optimal condition.In a statement, SDDOT Secretary Jane Smith emphasized the importance of investing in transportation infrastructure to support South Dakota's economic development and quality of life. "These projects reflect our commitment to improving the state's transportation system and providing a safe, reliable network for residents and visitors alike," said Smith.The announcement of these major infrastructure projects marks a significant milestone for South Dakota's transportation sector, demonstrating the state government's dedication to fostering growth and prosperity through strategic investments in key infrastructure assets. Residents and businesses across the state can look forward to a more efficient and reliable transportation system as these projects come to fruition in the years ahead.