U.S. Federal Route 31 runs north-south in Marshall County. This is a expressway through the entire length of the county. It links Plymouth with Indianapolis and South Bend. U.S. Rt. 31 passes through the following town in Marshall County. Lapaz
Prior to 2014, U.S. Rt. 31 was located on a 4-lane highway that ran through towns from Plymouth to South Bend. In August of 2014, a new interstate grade freeway was opened. Below are pictures from when the highway was a surface level highway. Former NB U.S. Rt. 31 near Harris. Former NB U.S. Rt. 31 in Lapaz. A set of guide signs that once stood at the surface intersects of U.S.
Rt. 6 and U.S. Rt. 31.
U.S. Rt. 31 is not multi-plexed in Marshall County. U.S. Rt. 31 intersects the following highways in Marshall County. Indiana State Route 110, near Walnut.
NB U.S. Rt. 31 north of IN St Rt 110. NB U.S. Rt. 31 south of Argos. NB U.S. Rt. 31 at IN St Rt 10. NB U.S. Rt. 31 north of IN St Rt 10. NB U.S. Rt. 31 south of Michigan Road. NB U.S. Rt. 31 south of Plymouth. A guide marker in Plymouth. A set of guide markers on NB U.S. Rt. 31. NB U.S. Rt. 31 at U.S. Rt. 30. NB U.S. Rt. 31 at U.S. Rt. 30. A BGS on EB U.S. Rt. 30. Another BGS on EB U.S. Rt. 30. A BGS on WB U.S. Rt. 30. A BGS on EB U.S. Rt. 30. A BGS on EB U.S. Rt. 30. NB U.S. Rt. 31 north of U.S. Rt. 30. NB U.S. Rt. 31 north of U.S. Rt. 30. NB U.S. Rt. 31 north of Plymouth. NB U.S. Rt. 31 south of Veterans Parkway. NB U.S. Rt. 31 north of Veterans Parkway. NB U.S. Rt. 31 north of Veterans Parkway. NB U.S. Rt. 31 south of U.S. Rt. 6. A guide marker on EB U.S. Rt. 6. A junction marker on EB U.S. Rt. 6. A set of guide markers on EB U.S. Rt. 6. A BGS on EB U.S. Rt. 6. NB U.S. Rt. 31 north of U.S. Rt. 6.
