| U.S. Route 31 | ||||
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| Route information | ||||
| Maintained by INDOT | ||||
| Length: | 266.02 mi (428.12 km) | |||
| Existed: | October 1, 1926 – present | |||
| Major junctions | ||||
| South end: |
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| North end: |
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| Location | ||||
| Counties: | Clark, Scott, Jackson, Bartholomew, Johnson, Marion, Hamilton, Tipton, Howard, Miami, Fulton, Marshall, St. Joseph | |||
| Highway system | ||||
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I-65 near Jeffersonville
I-265 near Clarksville
I-65 near Crothersville
US 50 near Seymour
I-65 near Edinburgh![]()
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I-465 / I-69 / I-74 / I-70 at Indianapolis
US 35 at Kokomo
US 24 near Peru
US 30 near Plymouth