 in Dane County, US 18 and US 151 bypass Mount Horeb, crossing WIS 78 and WIS 92, and Verona and enter the Madison area, first passing through Fitchburg.Upon entering Madison, US 18 and US 151 join US 12 and US 14 east along the West Beltline Highway.US 151 and US 14 turn off the beltline three miles (5 km) east and US 12 and US 18 continue east, crossing US 51 and I-39 / I-90 southeast of Madison.