U.S. Federal Route 20 runs east-west across Central Buchanan County. It runs from the Buchanan/Delaware County Line, near Masonville, to the Delaware/Black Hawk County Line, Jesup. U.S. Rt. 20 passes through the following towns in Buchanan County. Winthrop Independance
U.S. Rt. 20 is multi-plexed in Buchanan County. U.S. Rt. 20 intersects the following highways in Buchanan County. Iowa State Route 187, near Masonville. Iowa State Route 150, at Independance.
WB U.S. Rt. 20 at the Buchanan/Delaware County Line. WB U.S. Rt. 20 west of IA St Rt 187. WB U.S. Rt. 20 east of BCH W40. WB U.S. Rt. 20 west of BCH W40. WB U.S. Rt. 20 east of IA St Rt 150. WB U.S. Rt. 20 west of IA St Rt 150. WB U.S. Rt. 20 near Lime Creek. WB U.S. Rt. 20 east of BCH V65. WB U.S. Rt 20 at BCH V65.
