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U.S. Route 4
US 4 highlighted in red
Route information
Length	252.62 mi (406.55 km)
Existed	1926[1]–present
Major junctions
South end	US 9 /US 20 inEast Greenbush, NY
Major intersections	I-90 inEast Greenbush, NY US 7 inRutland, VT I-89 inHartford, VT I-91 /US 5 inWhite River Junction, VT I-89 inLebanon, NH I-93 /US 3 /US 202 inConcord, NH
East end	I-95 /Blue Star Turnpike /Spaulding Turnpike /US 1 Byp. /NH 16 inPortsmouth, NH
Location
Country	United States
States	New York,Vermont,New Hampshire
Highway system
United States Numbered Highway System List Special Divided
←US 3 US →US 5 ←Route 12B N.E. →Route 14

U.S. Route 4 (US 4) is a 253-mile-long (407 km)United States Numbered Highway that runs fromEast Greenbush, New York, in the west toPortsmouth, New Hampshire, in the east, traversingVermont.

InNew York, US 4 is signed north–south to reflect its alignment in the state. In Vermont andNew Hampshire, the route is signed east–west, the conventional direction for even-numbered U.S. Routes.

In the state ofNew York, US 4 begins at the concurrency ofUS 9 andUS 20 inEast Greenbush. Heading northward, it has an interchange withInterstate 90 (I-90), continuing northward intoTroy. In Troy, it passes byHudson Valley Community College as well as the headquarters of the42nd Infantry Division. US 4 then heads downhill, passing the historic South End Tavern as Burden Avenue, named for the historicBurden Iron Works. Later, US 4 assumes Fourth Street, which splits intoparallel one-way streets (Third Street handles southbound traffic). Once throughTroy's historic downtown, the streets meet and pass by theGreen Island Bridge, later passing under theCollar City Bridge and intoLansingburgh.

After Lansingburgh, US 4 turns left to cross theHudson River on theTroy–Waterford Bridge, enteringWaterford, joining withNew York State Route 32 (NY 32) to head north together west of the Hudson. AfterMechanicville, US 4 and NY 32 split, and US 4 passes by theBattles of Saratoga andGerald B. H. Solomon Saratoga National Cemetery. NY 32 joins again to pass throughSchuylerville, after which US 4 splits off to cross the Hudson River one last time.

Running parallel to theChamplain Canal, US 4 passes through villages includingFort Edward,Hudson Falls,Fort Ann, andWhitehall. After a concurrency withNY 22, US 4 heads eastward intoVermont.

In the state ofVermont, US 4 immediately becomes a four-lane divided expressway. The historic routing of US 4 runs nearby asVermont Route 4A (VT 4A), which later becomesUS 4 Business as it entersRutland. South of Rutland, US 4 meetsUS 7 and overlaps it into downtown, meeting the east end of its business route. East of Rutland, US 4 is a two-lane highway, meandering through theGreen Mountains, passing byKillington, going throughWoodstock andQuechee, crossing theQuechee Gorge, and meetingUS 5,I-89, andI-91 atWhite River Junction. Crossing theConnecticut River, US 4 enters New Hampshire.

In the state ofNew Hampshire, US 4 passes throughLebanon, meeting I-89 again. It then heads southeast toBoscawen, where it briefly overlapsUS 3 before joiningI-93 intoConcord. Turning east, US 4 briefly overlapsI-393 and for a longer stretch withUS 202. Passing throughDurham, US 4 joins theSpaulding Turnpike atDover Point and travels southeast to its eastern terminus inPortsmouth at thePortsmouth Traffic Circle.

Prior to being designated US 4, the road fromWhitehall, New York, eastward through Vermont wasNew England Route 13 (Route 13). From the Vermont–New Hampshire state line toFranklin, New Hampshire, it was the eastern extension ofRoute 14. From Franklin toConcord, New Hampshire, it usedRoute 6 (nowUS 3), and, from Concord toNorthwood, New Hampshire, it usedRoute 9 (nowNew Hampshire Route 9 [NH 9]). Between Northwood andDover, New Hampshire, it used a road that was previously not numbered. From Dover to its eastern terminus atPortsmouth, New Hampshire, the road used to be known asRoute 16 (nowNH 16).

1926–1930:Glens Falls, New York, at the point whereUS 9 split intoUS 9W andUS 9E, toPortsmouth, New Hampshire.^[2]
1930–:East Greenbush, New York, following former US 9E, through its former west terminus, to Portsmouth, New Hampshire.^[3][4]

New York

US 9 /US 20 inEast Greenbush

I-90 north of East Greenbush

Vermont

US 7 inthe Town of Rutland. The highways travel concurrently tothe City of Rutland.

I-89 inHartford

US 5 in Hartford. The highways travel concurrently toWhite River Junction.

New Hampshire

I-89 inLebanon

I-89 in Lebanon

US 3 inBoscawen. The highways travel concurrently through the city.

I-93 inConcord. The highways travel concurrently through the city.

I-93 /I-393 /US 202 in Concord. I-393/US 4 travel concurrently toPembroke. US 3/US 202 travel concurrently toNorthwood.

I-95 inPortsmouth

• East–West Highway (New England)

• U.S. Route 104 becameNY 104 in 1971. It never directly connected to US 4.

• Endpoints of US 4

• U.S. Route 4
• United States Numbered Highway System

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