U.S. Route 20 in Indiana

U.S. Route 20
US 20 highlighted in red, US 20 Bus. in blue
Route information
Maintained by INDOT
Length	155.734 mi[1] (250.630 km)
Existed	1926–present
Major junctions
West end	US 12 / US 20 / US 41 at Illinois state line
Major intersections	US 41 at Whiting US 12 at Gary I-65 / I-90 / Indiana Toll Road at Gary US 421 at Michigan City I-94 near Michigan City US 35 near Michigan City US 31 at South Bend US 33 at Elkhart I-69 near Angola
East end	US 20 at Ohio state line
Location
Country	United States
State	Indiana
Counties	Lake, Porter, LaPorte, St. Joseph, Elkhart, LaGrange, Steuben
Highway system
United States Numbered Highway System List Special Divided Indiana State Highway System Interstate US State Scenic
← SR 19 → SR 22

U.S. Route 20 (US 20) in Indiana is a main east–west highway that is parallel to the Indiana Toll Road. The western terminus of US 20 is at the Illinois state line and the eastern terminus is at the Ohio state line. US 20 through Whiting, East Chicago, and Gary is concurrent with US 12 twice. The route varies between one-way, two-lane, and four-lane streets, in Northwest Indiana. From the east side of Gary to west of South Bend, US 20 is a four-lane undivided highway. The route then heads around the west and south sides of South Bend and Elkhart as a four-lane limited access divided highway. East of State Road 15 (SR 15), US 20 is two-lane rural highway.

US 20 was part of the Dunes Highway from the Illinois state line to Michigan City, concurrent with US 12. The Dunes Highway started being paved in 1922. The section of the highway that is known as Lincoln Way was part of the 1913 section of the Lincoln Highway. Indiana State Highway Commission, later renamed Indiana Department of Transportation (INDOT), began signing US 20 in 1926. US 20 went through downtown South Bend and Elkhart before the St. Joseph Valley Parkway was built. Before the parkway was completed, the route that was open to traffic was called US 20 Bypass (US 20 Byp.). A small realignment in LaGrange County was done in 2005, in which the roadway was straightened. Other small realignments included the route through Michigan City, which followed US 35 from US 12 to Interstate 94 (I-94).