At 397 miles (639 km), NY 17 is the longest state route in New York, and is the second-longest highway of any kind in the state, behind only the New York State Thruway.

Projects progressed as part of the NYS Route 17 to I-86 Enhancements Initiative would improve the NYS Route 17 corridor and/or interchanges in consideration of current interstate design standards …

Dec 14, 2025 · NY 17, as of 2012, was the longest route in New York, with the freeway sections composed of the Southern Tier Expressway and the Quickway. Upgrades to the route are still ongoing.

New York State Route 17 (NY 17) is a state highway that extends for 397 miles (638.91 km) through the Southern Tier and Downstate regions of New York in the United States.

The long, slow task of pushing a railroad through four hundred miles of rugged terrain was mirrored by the building of the NY 17 expressway, and later by the movement, now brought partially to fruition, to …

NY 17 began in Westfield where NY 5 and NY 394 meet. From there, NY 17 followed what is now NY 394 to Mayville, NY 430 to Jamestown, and NY 394 to Steamburg. Between Steamburg and …

NY 17 is multiplexed with I-81 for a few exits. The two routes then split. NY 17 is known as the Quickway from this point on. The Quickway runs southeast through the Catskill Mountains. It ends at the New …

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Explore road trip itineraries along this interstate highway. Visit the Road Trips page to find more road trip itineraries, how-to guides, and resources.

Over the years, the 381-mile-long road has been rated among the most beautiful in the United States. The original Route 17 was completed in the late 1920's.