U.S. Federal Route 30 is the main east-west high across Central Marshall County. This is a four-lane divided expressway from county line to county line. U.S. Rt. 30 passes through the following town in Marshall County. Plymouth
EB U.S. Rt. 30 east of the Marshall/Starke County Line. EB U.S. Rt. 30 west of Plymouth. EB U.S. Rt. 30 at Queen Road. EB U.S. Rt. 30 at Plymouth. WB U.S. Rt. 30 west of IN St Rt 17. A junction marker on SB IN St Rt 17. A BGS on NB IN St Rt 17. A BGS on SB IN St Rt 17. EB U.S. Rt. 30 east of IN St Rt 17. EB U.S. Rt. 30 west of U.S. Rt. 31. WB U.S. Rt. 30 west of U.S. Rt. 31. A BGS on SB U.S. Rt. 31. A guide marker 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. EB U.S. Rt. 30 east of U.S. Rt. 31.
