Interstate 390 (New York)
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Map of western New York with I-390 highlighted in red
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| Route information | ||||
| Maintained by NYSDOT | ||||
| Length: | 75.86 mi (122.08 km) | |||
| Existed: | c. 1973 – present | |||
| Major junctions | ||||
| South end: |
   I-86 / NY 17 / Southern Tier Expressway in Avoca
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 US 20A in Geneseo  US 20 / NY 5 in Avon  I-90 / New York Thruway in Henrietta I-590 in Brighton
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| North end: |
  I-490 / NY 390 in Gates
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| Highway system | ||||
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.svg)
Interstate 390 (I-390) is a 75.86-mile (122.08 km) north–south auxiliary Interstate Highway located entirely within New York in the United States. The southern terminus of the route is at the Southern Tier Expressway (I-86 and New York State Route 17 or NY 17) in the town of Avoca. Its northern terminus is at I-490 (the Western Expressway) in Rochester. North of I-490, the expressway continues as NY 390 to the Lake Ontario State Parkway in Greece. I-390 connects to its parent, I-90 (the New York State Thruway), in Henrietta, a southern suburb of Rochester. The route is known as the Genesee Expressway from Avoca to I-590 in Brighton, where it becomes part of the Rochester Outer Loop.
In addition to servicing Rochester, I-390 serves as an important connecting route between the Rochester metropolitan area and Corning and the rest of the Southern Tier of New York. The freeway also serves several smaller communities between Corning and Rochester, including the Livingston County villages of Dansville and Geneseo. I-390 effectively replaced U.S. Route 15 (US 15) and parallels NY 15, US 15's de facto successor north of Corning. From Lakeville north to Brighton, the two routes cross paths four times and are located no more than 1.5 miles (2.4 km) apart along the entire stretch.
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