Interstate 90 in New York

Interstate 90
Map of New York with I-90 highlighted in red
Route information
Maintained by NYSTA and NYSDOT
Length	385.48 mi[1] (620.37 km)
Existed	August 14, 1957[2]–present
NHS	Entire route
Major junctions
West end	I-90 at the Pennsylvania state line in Ripley
Major intersections	US 219 in West Seneca I-190 in Buffalo I-290 in Buffalo I-390 / NY 253 / NY 15 in Henrietta I-81 near Syracuse I-88 / NY 7 in Rotterdam I-87 / New York Thruway / NY 910F in Albany I-787 in Albany Berkshire Connector in Schodack Taconic State Parkway in Chatham
East end	I-90 / Mass Pike at the Massachusetts state line in Canaan
Location
Country	United States
State	New York
Counties	Chautauqua, Erie, Genesee, Monroe, Ontario, Seneca, Cayuga, Onondaga, Madison, Oneida, Herkimer, Montgomery, Schenectady, Albany, Rensselaer, Columbia
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future New York Highways Interstate US State Reference Parkways
← NY 89A → NY 90

Interstate 90 (I-90) is a part of the Interstate Highway System that runs from Seattle, Washington, to Boston, Massachusetts. In the US state of New York, I-90 extends 385.48 miles (620.37 km) from the Pennsylvania state line at Ripley to the Massachusetts state line at Canaan, and is the second-longest highway in the state after New York State Route 17 (NY 17). Although most of the route is part of the tolled New York State Thruway, two non-tolled sections exist along I-90 (the first, situated outside of Buffalo, is included in the Thruway system; the second, situated in the Capital District, is not part of the Thruway system and links Albany and its eastern suburbs). Within New York, I-90 has a complete set of auxiliary Interstates, which means that there are Interstates numbered I-190 through I-990 in the state, with no gaps in between. For most of its length in New York, I-90 runs parallel to the former Erie Canal route, NY 5, US Route 20 (US 20) and the CSX Transportation railroad mainline that traverses the state.

I-90 was assigned in 1957 as part of the establishment of the Interstate Highway System. In New York, it was overlaid on the preexisting New York State Thruway from Pennsylvania to Albany, from where it would have continued to Massachusetts on a new freeway that bypassed the Berkshire Connector to the north. Ultimately, the freeway was built from the Thruway mainline in Albany to the Berkshire Connector in Schodack, and I-90 was assigned to the segment of the connector east of the proposed freeway. The Albany–Schodack freeway was completed in stages during the 1960s and 1970s and fully open by 1977.