West Main Street, East Main Street, Erie Road, Main Street, Central Avenue, Main Road, Southwestern Boulevard, Transit Road, Broadway, Telephone Road, East Avon Road, East Avon Lima Road, State Street, Buffalo Road, Western Boulevard, Eastern Boulevard, Hamilton Street, Lake Front Drive, Waterloo Geneva Road, Fall Street, Cayuga Street, Auburn Road, Clark Street Road, East Genesee Street, Cherry Valley Turnpike, Ledyard Avenue, Forman Street, Albany Street, Nelson Street, Western Turnpike, Western Avenue, Madison Avenue, Dunn Memorial Bridge, Columbia Street, Columbia Turnpike, Albany Avenue, Church Street, Columbia Pike

Direction:

East/West

Western Terminus:

Pennsylvania-New York state line

Eastern Terminus:

New York-Massachusetts state line

Distance:

374.04 miles

Counties:

Chautauqua, Erie, Genesee, Livingston, Ontario, Seneca, Cayuga, Onondaga, Madison, Oneida, Herkimer, Otsego, Schoharie, Schenectady, Albany, Rensselaer, Columbia

Signed:

Yes

US 20 is a major east/west route crossing the country from Newport, Oregon, to Boston, Massachusetts. It is the longest numbered route in the United States. US 20 enters New York from Pennsylvania just east of Erie and runs near the shore of Lake Erie to the Buffalo area. It passes south and east of Buffalo without ever entering the city itself.

Heading out of the Buffalo area, US 20 turns east and crosses the state, running south of and parallel to the New York Thruway (I-90). It passes along the northern tips of the Finger Lakes and avoids major cities such as Rochester, Syracuse, and Utica. When it reaches Albany, US 20 does actually enter the city. There, it joins US 9 and crosses the Dunn Memorial Bridge across the Hudson River. On the other side, the two routes are multiplexed for a few miles, and then US 9 splits off to continue south toward New York City. US 20 continues east to the state line, where it continues into Massachusetts.