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On April 13, 2026, the South Dakota Department of Transportation (SDDOT) announced plans for a series of major infrastructure upgrades across the state. The ambitious projects aim to modernize and improve the transportation network in South Dakota, with a focus on enhancing safety, reducing congestion, and promoting economic growth.One of the key projects unveiled by the SDDOT is the expansion of Interstate 90 in the western part of the state. The interstate, which serves as a major thoroughfare for both commuters and freight traffic, will be widened to accommodate increased traffic volumes and improve safety. Additionally, new interchange ramps and improved signage will be implemented to enhance traffic flow and reduce bottlenecks.In the eastern part of the state, the SDDOT will be investing in the expansion and improvement of state highways to better connect rural communities and facilitate economic development. This includes widening existing highways, adding new lanes, and upgrading bridges and overpasses to meet current safety standards. These improvements will not only benefit local residents but also support businesses by providing more efficient transportation routes for goods and services.Furthermore, the SDDOT has announced plans to invest in the development of a statewide public transit system to provide a reliable and affordable transportation option for residents. This initiative is aimed at improving access to transportation for individuals who may not have access to a personal vehicle, as well as reducing traffic congestion and greenhouse gas emissions.Overall, the SDDOT's ambitious plans for infrastructure upgrades signal a commitment to enhancing the transportation network in South Dakota for the benefit of residents, businesses, and visitors alike. By investing in modernizing and expanding the state's transportation infrastructure, the SDDOT is laying the groundwork for a more efficient and sustainable future for South Dakota.