In 2004, U.S. Highway 151 was upgraded to a limited-access highway; it bypassed the city south of Platteville. Prior to the upgrade, the highway exits were closer to Platteville. The city made changes to adjust to the new southern US 151 bypass, and it has influenced subsequent development. A new hospital was built just north of US 151 and next to its off ramps. A Walmart Supercenter and a Menards have opened near the northern end of the US 151 bypass.