 The National Route returns to US 61 via US 61 Business, splitting to follow CR X62 and Madison Avenue into Burlington.It turns east onto Main Drive through Crapo Park and curves back north on Main Street, which leads to CR X99 (former Iowa 99) to north of Toolesboro and CR X61 into Muscatine.After turning onto US 61 Business, the National Route leaves the state on the Norbert F. Beckey Bridge (Iowa 92).