Interstate 390 (New York)

Interstate 390 (New York) is a north–south Interstate Highway located entirely within the U.S. state of New York. It serves as a vital transportation corridor connecting the Southern Tier region to the Rochester metropolitan area. The highway extends approximately 79 miles from its southern terminus at Interstate 86 and NY 17 in Avoca to its northern terminus at Interstate 490 in Brighton, a suburb of Rochester. Maintained by the New York State Department of Transportation, it provides a key link for commerce and travel between the Finger Lakes and Western New York regions.

Route description

Beginning at a trumpet interchange with I-86 and NY 17 in the town of Avoca in Steuben County, I-390 proceeds northward through a primarily rural landscape. It passes near the communities of Bath and Dansville, offering access to Stony Brook State Park. The route crosses into Livingston County, where it serves the Genesee River valley and the University of Rochester's Medical Center campus. Entering Monroe County, the highway becomes a major commuter artery into the Rochester area, passing through suburban towns like Rush and Henrietta before terminating at a complex interchange with I-490 near Brighton. Throughout its course, it is designated as part of the Appalachian Development Highway System.

History

The route of I-390 was originally planned in the 1950s as part of the federal Interstate Highway System. Construction began in the late 1960s, with the first segment opening to traffic in Steuben County near Avoca. Progress continued northward through the 1970s, with the section through Livingston County opening to connect Dansville to the Rochester area. The final segment, completing the connection to I-490 in Brighton, was opened in 1980. The highway's designation was formally established by the American Association of State Highway and Transportation Officials in 1970. It has since undergone several modernization projects, including bridge replacements and interchange improvements led by the New York State Department of Transportation.

Exit list

The exit list for I-390 follows a standard numbering scheme from south to north. Key interchanges in Steuben County include exits for NY 415 near Kanona and NY 54 serving Bath. In Livingston County, major exits provide access to NY 36 for Dansville and NY 63 near Mount Morris. The Monroe County section features numerous exits serving the Rochester suburbs, including interchanges with NY 15A, NY 251, and NY 253. The northern terminus is a multi-level interchange with I-490 and NY 590.

Major intersections

The most significant junctions along I-390 are its termini. Its southern end is a major trumpet interchange with I-86 and NY 17 (the Southern Tier Expressway) in Avoca. At its midpoint, it has a partial interchange with NY 408 near Dansville. Its northern terminus is a complex, directional interchange with I-490 in Brighton, which also provides direct connections to NY 590 and the New York State Thruway (I-90) via I-490. Other notable crossings include US 15 and US 20 in Lakeville.

Auxiliary routes

Interstate 390 has one signed auxiliary route, Interstate 590. This spur route begins at the northern terminus of I-390 in Brighton and travels north and east into the city of Rochester, providing a direct link to downtown Rochester and the eastern suburbs along Irondequoit Bay. It terminates at an interchange with NY 104. The New York State Department of Transportation also maintains several unsigned reference routes connected to I-390, including NY 390, a reference marker for a former segment of highway.

Category:Interstate Highways in New York (state)