U.S. Federal Route 218 runs though southwestern portion of Linn County. This highway enters Linn County from Johnson County on the I-380 expressway. At Cedar Rapids, it turns west and joins the U.S. Rt. 30 (Lincoln Freeway), and heads into Benton County. U.S. Rt 218 passes through the following town in Linn County. Cedar Rapids
U.S. Rt. 218 is multi-plexed in Linn County. Interstate 380, from the Johnson/Linn County Line to Cedar Rapids. Iowa State Route 27, from the Johnson/Linn County Line to Cedar Rapids.
U.S. Rt. 151, from I-380/IA 27 to Williams Blvd. in Cedar Rapids.
U.S. Rt. 30, from I-380/IA 27 to the Linn/Benton County Line.