U.S. Federal Route 20 is a east-west highway across Central St. Joseph County. From the La Porte/St. Joseph County Line to the St. Joseph Valley Parkway. At the South Bend Metro Area, U.S. Rt. 20 runs along the St. Joseph Valley Parkway on the west and southside of town. U.S. Rt. 20 passes through the following towns in St. Joseph County. New Carlisle
Plainfield South Bend
Mishawaka
U.S. Rt. 20 is multi-plexed in St. Joseph County. U.S. Rt. 31, at South Bend.
Branches of U.S. Rt. 20 in St. Joseph County. WB U.S. Rt. 20 at the St. Joseph/Elkhart County Line. WB U.S. Rt. 20 east of IN St Rt 331. A BGS on NB IN St Rt 331. EB U.S. Rt. 20/NB IN St Rt 331 east of Bremen. WB U.S. Rt. 20 near Iron Wood Road. EB U.S. Rt. 20 east of south U.S. Rt. 31. A BGS on NB U.S. Rt. 31. A BGS on NB U.S. Rt. 31. A BGS on NB U.S. Rt. 31. A BGS on NB U.S. Rt. 31. A BGS on NB U.S. Rt. 31. A BGS on NB U.S. Rt. 31. A BGS on NB U.S. Rt. 31. A BGS on NB U.S. Rt. 31. A BGS on NB U.S. Rt. 31. A BGS on EB U.S. Rt. 20/SB U.S. Rt. 31. A BGS on NB U.S. Rt. 31. NOTE: The "BY-PASS" banner. A BGS on SB BUSN U.S. Rt. 31. A BGS on SB BUSN U.S. Rt. 31. WB U.S. Rt. 20/NB U.S. Rt. 31 west of U.S. Rt. 31/BUSN U.S. Rt. 31. EB U.S. Rt. 20/SB U.S. Rt. 31 west of U.S. Rt. 31/BUSN U.S. Rt. 31. A BGS on NB Mayflower in South Bend. WB U.S. Rt. 20/NB U.S. Rt. 31 on the southwest side of South Bend. A marker on WB U.S. Rt. 20/NB U.S. Rt. 31. WB U.S. Rt. 20/NB U.S. Rt. 31 south of IN St Rt 23. EB U.S. Rt. 20/SB U.S. Rt. 31 north of IN St Rt 23. A BGS on WB IN St Rt 2. WB U.S. Rt. 20/NB U.S. Rt. 31 north of IN St Rt 2. A BGS on SB U.S. Rt. 31. A BGS on WB U.S. Rt. 20/NB U.S. Rt. 31. A BGS near the South Bend Airport. A BGS on NB U.S. Rt. 31. EB U.S. Rt. 20 west of U.S. Rt. 31. EB U.S. Rt. 20 near Lydick. EB U.S. Rt. 20 near Olive. EB U.S. Rt. 20 east of New Carlisle. EB U.S. Rt. 20 on the eastside of New Carlisle. EB U.S. Rt. 20 in New Carlisle. EB U.S. Rt. 20 at New Carlisle.