page_title: U.S. Route 20
section_title: Indiana
hierarchical_section_title: U.S. Route 20 / Route description / Indiana
context_page_description: U.S. Route 20 or U.S. Highway 20 is an east–west United States highway that stretches from the Pacific Northwest all the way to New England. The "0" in its route number indicates that US 20 is a coast-to-coast route and major route. Spanning 3,365 miles, it is the longest road in the United States, and the route is roughly parallel to that of the newer Interstate 90, which is in turn the longest Interstate Highway in the U.S. There is a discontinuity in the official designation of US 20 through Yellowstone National Park, with unnumbered roads used to traverse the park.
  US 20 and US 30 break the general U.S. Route numbering rules in Oregon, since US 30 actually starts north of US 20 in Astoria, and runs parallel to the north throughout the state. The two run concurrently and continue in the correct positioning near Caldwell, Idaho. This is because US 20 was not a planned coast-to-coast route while US 30 was. US 20 originally ended at the eastern entrance of Yellowstone Park; it was extended in 1940.
  The highway's eastern terminus is in Boston, Massachusetts, at Kenmore Square, where it meets Route 2.
context_section_description: In the state of Indiana, US 20 enters from the west beneath the Chicago Skyway with US 12 and US 41. US 20 passes through heavily industrialized northwestern Indiana and is the main east–west artery through Gary. It then parallels US 12 to just west of Michigan City before running due east to South Bend. US 20 travels around South Bend and Elkhart on the St. Joseph Valley Parkway, a four-lane limited access freeway, then returns to surface road east of Elkhart. US 20 then passes through LaGrange and Angola, intersecting with I-69 before leaving Indiana just north of the eastern terminus of the Indiana Toll Road.
  From Gary to South Bend, US 20 was built as the Dunes Relief Road. During the 1930s and 1940s the Dunes Highway, US 12, was becoming more crowded as housing lots and communities developed in the Indiana Dunes. Today, there are numerous communities along US 20 and the lakefront, including Gary, Portage, Burns Harbor, Porter, Chesterton, Pines, and Michigan City.
  Most notably, the route is one of the main access roads to Indiana Dunes National Park.
caption: Looking westbound at US 20 as it meets State Road 127 in a traffic circle in Angola, Indiana
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