the current arrangement of the interchange with its cloverleaf ramps has been deemed unsafe. The Iowa DOT proposes to rebuilt the interchange as a turbine interchange, which will eliminate weaving. The project is scheduled to begin in 2020. Major intersections Related routes Mount Pleasant business route U.S. Highway 218 Business (US 218 Bus.) was designated along a former routing of US 218 through Mount Pleasant, the northernmost are officially known as Iowa 438. The routing was created as a result of construction of the Avenue of the Saints corridor through Iowa. The new Avenue of the Saints corridor took US 218/Iowa 27 and US 34 around the eastern and northern edges of Mount Pleasant. The Iowa 438 section of US 218 Bus. serves as a connector from southbound US 218/Iowa 27 to westbound US 34. Waverly business route US 218 Business (US 218 Bus.) in Waverly was designated December 2, 1998, on the old segment of US 218 after it was routed around Waverly. The business route spans . It intersects Iowa 3 in downtown Waverly and the two routes run concurrently for about . South of Iowa 3, US 218 Bus. is officially known as Iowa 116. US 218 Bus. begins at exit 198 on US 218/Iowa 27 south of Waverly and ends at exit 205 on US 218/Iowa 27. Charles City business route US 218 Business (US 218 Bus.) in Charles City was designated along the old alignment of US 218 in 2000 after the construction of the Avenue of the Saints corridor created a bypass around Charles City. Upon its designation, the route was officially known by two Iowa state highways: Iowa 337 and Iowa 162. Iowa 337 was turned over to local jurisdictions in 2001 and Iowa 162 was turned over in 2006 after US 18 was relocated through Charles City. References External links Endpoints of US highway 218 18-2 18-2 18-2 2 Transportation in Lee County, Iowa Transportation in Henry County, Iowa Transportation in Washington County, Iowa Transportation in Johnson County, Iowa Transportation in Linn County, Iowa Transportation in Benton County, Iowa Transportation in Black Hawk County, Iowa Transportation in Bremer County, Iowa Transportation in Chickasaw County, Iowa Transportation in Floyd County, Iowa Transportation in Mitchell County, Iowa Transportation in Mower County, Minnesota Transportation in Dodge County, Minnesota Transportation in Steele County, Minnesota