U.S. Federal Route 218 is a north-south expressway through Central Johnson County. U.S. Rt. 218 passes through the following towns in Johnson County. Iowa City Coralville U.S. Rt. 218 is multi-plexed in Johnson County. Iowa State Route 27, from the Wahsington/Johnson County Line to the Linn/Washington County Line.
Interstate 380, from Interstate 80 to the Linn/Johnson County Line.
U.S. Rt. 218 crosses the following highways in Johnson County. Iowa State Route 1, near Iowa City.