U.S. Route 20 in New York

U.S. Route 20 in New York is a major east–west highway traversing the state for over 370 miles. It serves as a vital corridor connecting the Great Lakes region to New England, passing through diverse landscapes from the Lake Erie plain to the Hudson Valley. The route links numerous significant cities and towns, including Buffalo, Albany, and Syracuse, and parallels the path of the historic Erie Canal for much of its journey.

Route description

Entering from Pennsylvania in Chautauqua County, U.S. 20 runs concurrently with Interstate 90 through the Southern Tier before diverging near Ripley. It proceeds northeast, skirting the southern suburbs of Buffalo and passing through the village of Hamburg. East of Buffalo, the route serves the Genesee County communities of Avon and Caledonia before entering the Finger Lakes region. Here, it runs along the northern shores of Seneca Lake and Cayuga Lake, passing through the cities of Geneva and Auburn. The highway continues east through the Mohawk Valley near Utica and Herkimer, then ascends into the Albany area via the Helderberg Escarpment. Its final segment runs southeast through the Columbia County towns of New Lebanon before crossing into Massachusetts.

History

The routing of U.S. 20 largely follows early Native American trails and colonial turnpikes, most notably the Great Western Turnpike between Albany and Cherry Valley. It was officially designated as part of the United States Numbered Highway System in 1926, absorbing several state highways like Route 5 west of Auburn. Significant realignments occurred with the construction of parallel superhighways, including the New York State Thruway and Interstate 90. The route has been bypassed around several downtown areas, including those in Skaneateles and Cazenovia, with older alignments often designated as Route 5 or local roads.

Major intersections

Major junctions from west to east include the concurrency terminus with Interstate 90 in Ripley and intersections with U.S. Route 62 in Fredonia, U.S. Route 219 south of Buffalo, and Interstate 390 near Avon. In the Finger Lakes, it meets New York State Route 14 in Geneva and New York State Route 34 in Auburn. Key eastern intersections include junctions with Interstate 81 in LaFayette, New York State Route 12 in Bridgewater, Interstate 88 in Duanesburg, and Interstate 787 in Albany. The route terminates at the Massachusetts state line where it continues as U.S. Route 20 in Massachusetts.

Auxiliary routes

The primary auxiliary route of U.S. 20 in the state is U.S. Route 20A, an alternate route running south of the mainline between Avon and Wyoming. This route serves communities like Perry and Warsaw and historically provided a more direct path before the mainline was straightened. Another former auxiliary, U.S. Route 20N, was decommissioned in the 1930s.

Related routes

Several other major highways share corridors or provide parallel service to U.S. 20. Interstate 90 (the New York State Thruway) runs parallel for much of the western and central portion of the state. The historic New York State Route 5 is closely aligned, often running concurrently or as a business route through towns like Auburn. In the Capital District, New York State Route 7 and New York State Route 2 provide parallel east–west connections. The path of the Erie Canal and later the New York Central Railroad also closely follow the U.S. 20 corridor across upstate New York. Category:U.S. Route 20