U.S. Route 3

U.S. Route 3
US 3 highlighted in red
Route information
Maintained by MassDOT
Length:	277.90 mi[1] (447.24 km)
Existed:	1926[1] – present
Major junctions
South end:	Route 2A / Route 3 in Cambridge, MA
	I‑95 / Route 128 / Route 3A in Burlington, MA I‑495 / Lowell Connector in Chelmsford, MA Everett Turnpike in Nashua, NH NH 101 near Manchester, NH US 202 in Concord, NH US 4 near Concord, NH I‑93 in Franconia, NH US 302 in Carroll, NH US 2 in Lancaster, NH
North end:	Route 257 near Chartierville, Quebec
Location
States:	Massachusetts, New Hampshire
Highway system
United States Numbered Highway System List Special Divided Replaced Massachusetts State Highway System Interstate US State New Hampshire Highway System Interstate U.S. State Turnpikes ← Route 2A MA Route 3 → ← US 2 NH NH 3A → ← Route 5 N.E. Route 6A →

U.S. Route 3 (US 3) is a United States highway running 277.9 miles (447.2 km) from Cambridge, Massachusetts, through New Hampshire, to the Canada–US border near Third Connecticut Lake, where it connects to Quebec Route 257.

In New Hampshire, parts of US 3 are known as the Daniel Webster Highway. From Burlington, Massachusetts, to Nashua, New Hampshire, US 3 is a freeway. The segment in New Hampshire is a free portion of the Everett Turnpike, while the portion in Massachusetts is known as the Northwest Expressway. A second freeway portion exists in northern New Hampshire, where US 3 uses the Franconia Notch Parkway, overlapping Interstate 93.

Massachusetts Route 3 connects to the southern terminus of US 3 in Cambridge and continues south to Cape Cod. Though it shares a number, it has never been part of US 3. Both routes, which connect end-to-end, are treated as a single 91.3-mile (146.9 km) state highway by MassDOT, with mileposts increasing continuously from Cape Cod all the way to the New Hampshire state border. The official end according to AASHTO is at US 20 across the Charles River in Boston, though current signs indicate a terminus in Cambridge at Massachusetts Routes 2A/3.

Route description

Massachusetts

Cambridge to Burlington

US 3 begins in the south along Memorial Drive in Cambridge, along the Charles River, at an interchange with Massachusetts Avenue (Route 2A). The road continues "south" (actually east) as Route 3 towards downtown Boston, while US 3 heads west, then north along the river towards downtown Cambridge, joining with Route 2 along the way. It runs opposite Soldiers Field Road in Allston along this stretch. Passing south of the downtown area, US 3 and Route 2 transition onto the Fresh Pond Parkway and join Route 16 in a wrong-way concurrency (heading north on US 3, one is also heading west on Route 2 and east on Route 16). Near the Alewife MBTA station, Route 2 splits off as a freeway to the west (Concord Turnpike), while US 3 / Route 16 turn onto the Alewife Brook Parkway. Shortly thereafter, US 3 splits from the Parkway (which continues as Route 16) and joins Route 2A (Massachusetts Avenue) westbound, crossing into Arlington. In the center of town, US 3 and Route 2A split from Massachusetts Avenue and overlap briefly with Route 60 (in another wrong-way concurrency) before continuing along Mystic Street. Route 2A splits from US 3 just to the north. US 3 continues through parts of Winchester and Woburn without any major intersections before entering Burlington and interchanging with Interstate 95 / Route 128 (Yankee Division Highway) at exit 33. US 3 joins the freeway to connect with the Northwest Expressway, while its historic surface alignment continues as Route 3A.

Burlington to Tyngsborough (Northwest Expressway)

US 3 runs along 1.6 miles (2.6 km) of I-95 (Route 128) in a wrong-way concurrency before exiting at exit 32A onto its own freeway, the Northwest Expressway.

Originally built in the 1950s, before the cancellation of the Inner Belt, the US 3 freeway was to have extended into metro Boston before being truncated to I-95. Consequently, a partially completed cloverleaf interchange connects US 3 to I-95, and exit numbers on the US 3 freeway start at 25 and increase sequentially to 36.

The freeway closely parallels Route 3A, the historic alignment of US 3, along its entire 19-mile (31 km) length from Burlington to the New Hampshire state border. It passes through Billerica and into Chelmsford, where it connects with I-495 and the Lowell Connector, a freeway spur into downtown Lowell widely regarded as one of the most dangerous roads in the state. Continuing north, the freeway briefly enters Lowell, then passes through North Chelmsford and Tyngsborough before crossing the state line into Nashua, New Hampshire. The freeway continues north as the Frederick E. Everett Turnpike.

New Hampshire

US 3 is one of New Hampshire's most well-known roads, as it passes through most of the state's major cities and towns and is the only highway to extend from the Massachusetts state border in the south to the Canada–US border in the north. Running for 242 miles (389 km) in New Hampshire, US 3 is by far the longest signed highway in the state.

US 3 crosses the state border into Nashua and immediately becomes concurrent with the Everett Turnpike, running on the freeway for 6.7 miles (10.8 km) along the western side of the city. US 3 leaves the Everett Turnpike at exit 7E, crosses NH 101A and turns northeast for approximately 1.5 miles (2.4 km) along a segment known as the Henri Burque Highway, before turning north onto Concord Street, which soon becomes known as the Daniel Webster Highway. (Some locals erroneously refer to the Everett Turnpike from exit 7 through the I-293 interchange as Route 3 and refer to the actual US 3 only as the Daniel Webster Highway or "Old Route 3".)

US 3 continues north through the town of Merrimack and into Bedford, where it becomes South River Road. The highway parallels I-293 until it turns east in Manchester and then crosses the Merrimack River on Queen City Avenue, just after its intersection with I-293 / NH 3A and NH 114A. US 3 and NH 3A are signed in a wrong-way concurrency for approximately 0.6 miles (0.97 km) before US 3 turns north onto Elm Street towards downtown Manchester. After approximately 2.2 miles (3.5 km), US 3 turns east onto Webster Street, then joins NH 28 to proceed in a northeasterly direction towards Hooksett, interchanging with I-93. The two routes continue as Hooksett Road, then the Daniel Webster Highway.

In Suncook, NH 28 leaves to the northeast, and US 3 proceeds northwest towards Concord on Pembroke Street, becoming Manchester Street when it enters the Concord city limits. After crossing the Merrimack River and interchanging with I-93, US 3 intersects NH 3A (South Main Street), which terminates at its parent route. US 3 traverses downtown Concord as North and South Main streets (briefly overlapping with US 202 and NH 9), then follows North State Street to Fisherville Road to Village Street in Penacook before crossing the Contoocook River into Boscawen. US 3 travels north through Boscawen, briefly overlapping with US 4. The highway parallels the Merrimack River north into Franklin, where the highway meets NH 11. US 3 joins NH 11 and turns east; NH 3A also resumes at this intersection, continuing north. US 3 and NH 11 briefly form a three-route concurrency with NH 127 in Franklin, then pass through Tilton, crossing NH 132 and passing the western end of NH 140. Continuing northeast past Winnisquam Lake, US 3 and NH 11 reach Laconia and turn onto the Laconia-Gilford Bypass, intersecting with NH 106, NH 107, and NH 11A. At the northern end of the bypass, US 3 and NH 11 split after a 17.3-mile (27.8 km) overlap, with the U.S. highway continuing north on Lake Street to Weirs Beach and an intersection with NH 11B. US 3 continues north as the Daniel Webster Highway to Meredith at the northern end of Meredith Bay on Lake Winnipesaukee. In Meredith, US 3 intersects the northern terminus of NH 106, then joins NH 25 and continues north past Squam Lake into Holderness, passing the western termini of NH 25B and NH 113. Through Holderness, US 3 and NH 25 gradually turn west, then southwest, passing the southern end of NH 175, and then reaching the northern end of NH 132 in Ashland.

US 3 in Lincoln, New Hampshire

From Ashland to North Woodstock, US 3 proceeds north, roughly paralleling I-93 in the Pemigewasset River valley. Along this stretch it passes through the towns of Plymouth (NH 25 splits from US 3 near I-93 in Plymouth, which also marks the true northern terminus of NH 3A), West Campton (where it meets the western end of NH 49, the principal access road to Waterville Valley), Thornton, and Woodstock. In North Woodstock, US 3 crosses NH 112 (known to the east as the Kancamagus Highway).

Continuing north, US 3 joins with I-93 as it passes through Franconia Notch State Park, one of the more scenic drives in the White Mountains. This stretch of freeway is known as the Franconia Notch Parkway and is the only section of Interstate highway in the country with only one lane in each direction.

US 3 separates from I-93 at exit 35, shortly north of the northern park boundary in Franconia. From there, NH 141 branches northwest and US 3 heads north and east toward Twin Mountain and a junction with US 302. This portion of the road is noted for fairly frequent moose sightings, especially during sunrise and sunset when moose are particularly active.

Heading north from Twin Mountain, US 3 passes through the village of Carroll, where NH 115 branches to the northeast and US 3 bears to the northwest and the town of Whitefield. In the center of Whitefield, NH 142 branches to the northwest and NH 116 crosses, running roughly southwest to northeast. US 3 continues north to Lancaster, where it joins US 2 in the town center, and where NH 135 branches off to the west. After US 2 leaves to the west, US 3 continues north, roughly paralleling the course of the Connecticut River (which also forms the border with Vermont), through Northumberland and Groveton, where NH 110 ends. North of Groveton, US 3 continues to follow the river, through Stratford, North Stratford, and Columbia, until it reaches Colebrook, where it crosses NH 26 and meets the southern terminus of NH 145. Still following the Connecticut River north, US 3 passes through portions of Stewartstown and Clarksville. In Stewartstown, the road turns more directly east (still following the Connecticut River, which is no longer a boundary), before resuming a northeasterly direction through Pittsburg. Its last major intersection is at the northern terminus of NH 145. US 3 continues north for another 22 miles (35 km), eventually reaching the Pittsburg-Chartierville Border Crossing, where the road crosses into Chartierville, Quebec and becomes Quebec Route 257.

In total, US 3 runs along the Connecticut River and its source lakes for approximately 70 miles (110 km).

History

New England Interstate

Before the establishment of the U.S. Highway system, the section of US 3 / Massachusetts Route 3 from Orleans, Massachusetts, to Colebrook, New Hampshire, was part of the New England road marking system as New England Interstate Route 6 (NEI 6 or NE-6). It was replaced in its entirety with the establishment of US 3 and Massachusetts Route 3 in 1926.

Massachusetts

US 3 in Massachusetts closely follows the route of the early 19th-century Middlesex Canal and Middlesex Turnpike.

The modern Northwest Expressway was begun near Route 110 in Lowell before World War II. In the 1950s, it was extended south to Route 128 (later overlapped by I-95), and by the 1960s, it was completed north from Chelmsford to New Hampshire. By 2005, the chronically congested four-lane road, largely with antiquated ramps around Lowell, was later widened to six lanes (as it had been in Nashua, New Hampshire, a few years prior) with a breakdown lane on both the left and right sides of the road, and many interchanges were modernized in what was comically known as "The Big Wide", in reference to Massachusetts' other "Big" construction project (the Big Dig). The roadbed and bridges were built to support a fourth lane in each travel direction for future expansion. The $365 million, 21-mile (34 km) widening project was completed in 2005 from Burlington to the New Hampshire border.

The final section of the expressway was an unbuilt expressway, planned for inner suburban towns northwest of Boston, Massachusetts. The expressway was to supply a new route for U.S. Route 3, between MA 128 and the cancelled Interstate-695/Inner Belt. The highway was one of the expressway projects cancelled in the Gov. Francis Sargent's 1970 moratorium on expressway construction within MA 128. The latter section of the expressway was a key component of the "Master Plan Highway Plan for Metropolitan Boston."^[3][4] The highway would have travelled through Lexington, Arlington, Medford, Somerville, and Cambridge, before linking with the Inner Belt Expressway.^[3]

The original plan called for U.S. 3 and MA 2 to link up together at the Lexington-Arlington border, and continue southeasterly, crossing MA 16/Mystic Valley Parkway at the Arlington-Somerville border and proceeding into Cambridge toward Union Square, Somerville. A 1962 plan called for Routes 2 and 3 to converge at Alewife Brook Parkway with a longer stretch of new highway for Route 3 paralleling Lowell Street in Lexington and Summer Street in Arlington.^[3]

Exit numbers along the Northwest Expressway section in Massachusetts were to be changed to mileage based numbers under a project to start in 2016,^[5] but that project has now been indefinitely postponed.^[6]

Termini

According to the AASHTO route log, the southern terminus of US 3 is at the junction of Route 2A and Route 3 in Cambridge, which is where Route 2A crosses the Charles along the Harvard Bridge (also known as the Massachusetts Avenue Bridge).^[7] This is a change from AASHTO's 1989 Route Log which placed the terminus at US 20 in Boston, where Route 2 currently meets US 20 after crossing the Charles River at the Boston University Bridge.^[8] This was where US 3 met US 1 until that highway was re-routed in 1971.

The original northern terminus of US 3 (in 1926) was at Colebrook, New Hampshire, but the highway was extended to West Stewartstown in 1928, and to Pittsburg in 1937. Colebrook was the northern terminus again from 1939 to 1940. Since 1940, the highway has run through Pittsburg to the Pittsburg-Chartierville Border Crossing.

Major intersections

Although MassDOT inventories Massachusetts Route 3 and US 3 as one continuous route, this table includes the mileage only for US 3 starting from its southern terminus in Cambridge.

State	County	Location[2][9]	mi[10][2][9]	km	Exit	Destinations	Notes
Massachusetts	Middlesex	Cambridge	0.000	0.000		Route 2A east (Massachusetts Avenue south) / Route 3 south (Memorial Drive) – Boston	Diamond interchange; southern terminus of US 3; northern terminus of Route 3; no direct access from US 3 to westbound Route 2A
			1.047	1.685		Route 2 east (Boston University Bridge) – Boston	Roundabout interchange; south end of concurrency with Route 2
			3.975	6.397		Route 16 west (Huron Avenue) – Watertown, West Newton	South end of concurrency with Route 16
			5.444	8.761		Route 2 west (Concord Turnpike) – Arlington, Concord	North end of concurrency with Route 2
			5.820	9.366		Route 16 / Route 2A east (Massachusetts Avenue) / Alewife Brook Parkway north – Medford, Boston	North end of concurrency with Route 16; south end of concurrency with Route 2A
		Arlington	7.198	11.584		Route 60 west (Pleasant Street) – Belmont, Waltham	South end of concurrency with Route 60
			7.283	11.721		Route 60 east (Chestnut Street) – Medford, Revere	North end of concurrency with Route 60
			7.457	12.001		Route 2A west (Summer Street) / Mystic Valley Parkway east – Lexington, Concord	North end of concurrency with Route 2A
		Burlington	13.442	21.633		I‑95 north (Route 128 north) / Route 3A north (Cambridge Street) – Burlington, Portsmouth, NH	Interchange; south end of concurrency with I-95/Route 128; I-95 exit 33A
			14.866	23.925		I‑95 south (Route 128 south)	I-95 north exit 32A; north end of concurrency with I-95/Route 128; US 3 follows I-95 C/D lanes
					32B	Middlesex Turnpike – Burlington	Shared exit with I-95 C/D lanes
					25B	I‑95 south (Route 128 south) – Providence RI	I-95 exit 32A
		Bedford	17.646	28.398	26	Route 62 (Burlington Road) – Burlington, Bedford
		Billerica	21.167	34.065	27	Concord Road – Billerica, Bedford
			22.591	36.357	28	Treble Cove Road – North Billerica, Carlisle
		Chelmsford	24.691	39.736	29	Route 129 (Billerica Road) – Billerica, Chelmsford
			25.554– 26.108	41.125– 42.017	30	I‑495 (Blue Star Memorial Highway) / Lowell Connector north – Lawrence, Marlboro	I-495 exit 35; split into exits 30A (I-495 north), 30B (Lowell Connector), and 30C (I-495 south) northbound; split into exits 30A (I-495 north) and 30B (I-495 south) southbound; indirect southbound access to Lowell Connector via exit 30A
			26.571	42.762	31	Route 110 (Chelmsford Street) – Lowell, Chelmsford
			28.762	46.288	32	Route 4 (North Road) – North Chelmsford, Chelmsford
			30.819	49.598	33	Route 40 (Groton Road) – Westford, North Chelmsford
		Tyngsborough	33.029	53.155	34	Westford Road – Tyngsborough, Westford
			34.644	55.754	35	Route 113 (Kendall Road) – Dunstable, Tyngsborough
Massachusetts– New Hampshire line	Middlesex– Hillsborough county line	Tyngsborough– Nashua line	36.104 0.000	58.104 0.000	36	Middlesex Road – South Nashua NH	No southbound exit; northbound entrance extends into New Hampshire, where it merges with exit 1
					South end of Everett Turnpike
New Hampshire	Hillsborough	Nashua	0.834	1.342	1	Spit Brook Road – South Nashua
			1.553	2.499	2	To NH 3A / NH 111 / Daniel Webster Highway – Hudson	Access via the Circumferential Highway; signed as exit 1A northbound
			2.819	4.537	3	Daniel Webster Highway – South Nashua	Southbound left exit and northbound entrance
			3.055	4.917	4	East Dunstable Road	FAA Center signage was removed at the request of the FAA shortly after 9/11
			4.724	7.603	5	NH 111 to NH 111A – Nashua, Hudson, Pepperell MA	Signed as Exits 5E (east) and 5W (west)
			5.059	8.142	5A	Simon Street	Northbound exit only, formerly exit 5EA
			6.285	10.115	6	NH 130 (Broad Street) – Nashua, Hollis
			6.781	10.913		Everett Turnpike north / NH 101A – Nashua, Amherst, Milford	Exit 7 on Everett Turnpike; northern end of concurrency with the Everett Turnpike
		Merrimack	10.832	17.432		Industrial Drive to Everett Turnpike	Exit 10 on Everett Tpke.
			12.109	19.488		Greeley Street to Everett Turnpike	Exit 11 on Everett Tpke.
			15.745	25.339		Bedford Road to Everett Turnpike south	Exit 12 on Everett Tpke.
		Bedford	17.874– 18.148	28.765– 29.206		Wieczorek Drive to Manchester Airport / Everett Turnpike	Interchange opened in 2011; Exit 13 on Everett Tpke.
			20.900	33.635		NH 101 to I‑293 / Everett Turnpike – Boston, Concord, Manchester Airport	Southbound exit to and entrance from NH 101 east via Meetinghouse Road
			21.331	34.329		Kilton Road to NH 101 west – Bedford
		Manchester	22.690	36.516		NH 114A west / I‑293 / NH 3A north – Concord, Boston	Exit 4 on I-293; eastern terminus of NH 114A; southern terminus of wrong-way concurrency with NH 3A
			23.333	37.551		NH 3A south (South Elm Street)	Northern end of wrong-way concurrency with NH 3A
			25.974	41.801		NH 28 south (Beech / Maple Streets)	Southern end of concurrency with NH 28
	Merrimack	Hooksett	26.998– 27.591	43.449– 44.403		I‑93 to NH 101 – Salem, Concord	Exit 9 on I-93
			28.586	46.005		NH 28A south – Londonderry	Northern terminus of NH 28A
			29.082	46.803		NH 27 east – Candia, Raymond	Western terminus of NH 27
			29.578	47.601		NH 28 Bypass south – Derry	Northern terminus of NH 28 Bypass
		Allenstown	35.237	56.708		NH 28 north – Epsom, Alton	Northern end of concurrency with NH 28
		Pembroke	39.506	63.579		NH 106 north – Loudon, Laconia	Southern terminus of NH 106
		Concord	41.704	67.116		Korean Veterans Memorial Bridge over the Merrimack River
			41.775– 41.933	67.230– 67.485		I‑93 to I‑89 / I‑393 – Manchester, Lebanon, Plymouth, Portsmouth	Exit 13 on I-93
			42.173	67.871		NH 3A south (Main Street)	Southern end of silent concurrency with NH 3A
			42.729	68.766		US 202 west / NH 9 west (Pleasant Street) to NH 13	Southern end of concurrency with US 202 / NH 9
			43.024	69.240		NH 9 east (Loudon Road) to I‑93	Northern end of concurrency with NH 9
			43.411	69.863		US 202 east to I‑393 east	Northern end of concurrency with US 202
		Boscawen	50.812	81.774		US 4 east – Concord	Southern end of concurrency with US 4
			52.168	83.956		US 4 west – Andover	Northern end of concurrency with US 4
		Franklin	60.645	97.599		NH 127 south – Salisbury	Southern end of concurrency with NH 127
			61.307	98.664		NH 3A north / NH 11 west – Andover, Bristol	Northern end of concurrency with NH 3A; southern end of concurrency with NH 11
			61.755	99.385		NH 127 north – New Hampton	Northern end of concurrency with NH 127
	Belknap	Tilton	64.925	104.487		NH 132 south to I‑93 south – Northfield, Concord	Southern end of concurrency with NH 132
			66.203– 66.586	106.543– 107.160		I‑93 – Canterbury, Concord, Boston, New Hampton, Plymouth NH 140 east – Belmont, Gilmanton	Exit 20 on I-93; western terminus of NH 140
			66.678	107.308		NH 132 north – Sanbornton	Northern end of concurrency with NH 132
		Belmont	72.845	117.233		NH 11A – Laconia downtown	Western terminus of NH 11A
		Laconia	74.355	119.663		NH 106 to NH 107 – Laconia, Belmont, Concord	Partial interchange; no southbound exit to NH 106 north; no northbound entrance from NH 106 south
			74.999	120.699		NH 107 – Laconia, Gilmanton	Partial interchange; southbound exit and northbound entrance
		Gilford	76.040	122.375		NH 11A – Gilford, Laconia	Interchange
			78.649	126.573		NH 11 east – Alton	Northern end of concurrency with NH 11
		Gilford–Laconia line	79.442	127.850		NH 107 south – Laconia	Northern terminus of NH 107
		Laconia	82.684	133.067		NH 11B – Gilford, Alton Bay	Northern terminus of NH 11B
		Meredith	86.334	138.941		NH 106 – Laconia	Northern terminus of NH 106
			86.847	139.767		NH 104 – New Hampton	Eastern terminus of NH 104
			87.693	141.128		NH 25 east – Center Harbor, Ossipee, Conway	Southern end of concurrency with NH 25
		Center Harbor	90.778	146.093		NH 25B – Center Harbor	Western terminus of NH 25B
	Grafton	Holderness	95.526	153.734		NH 113 – Sandwich	Southern terminus of NH 113
			96.661	155.561		NH 175 – Campton	Southern terminus of NH 175
		Ashland	99.271	159.761		NH 132 – New Hampton, Tilton	Northern terminus of NH 132
			99.958– 100.339	160.867– 161.480		I‑93 – Tilton, Concord, Plymouth, Littleton	Exit 24 on I-93
		Plymouth	105.397	169.620		NH 175A to I‑93 – Holderness	Western terminus of NH 175A
			106.202	170.916		NH 3A south / NH 25 west to I‑93 – Rumney, Bristol, Concord, Littleton	Interchange; northern end of concurrency with NH 25; northern terminus of NH 3A
		Campton	109.525	176.263		To I‑93 – Campton, Littleton, Plymouth, Concord	Exit 27 on I-93 via Blair Road
			112.375	180.850		NH 49 to I‑93 – Campton, Waterville Valley	Western terminus of NH 49
		Thornton	113.804– 114.101	183.150– 183.628		I‑93 – Plymouth, Concord, Franconia, Littleton	Exit 29 on I-93
		Woodstock	120.410– 120.910	193.781– 194.586		I‑93 – Franconia, Littleton, Plymouth, Concord	Exit 30 on I-93
			125.420	201.844		NH 175 – Campton	Northern terminus of NH 175
			126.031	202.827		NH 112 to I‑93 – Lincoln, Conway, Woodsville
		Lincoln	128.210– 128.394	206.334– 206.630		I‑93 – Concord, Littleton	Exit 33 on I-93
			131.562	211.729		I‑93 south	Exit 34A on I-93; southern end of concurrency with I-93 and the Franconia Notch Parkway
		Franconia	135.923	218.747	34B	Cannon Mountain Tramway – Old Man Historic Site	Exit numbers follow I-93
			136.623	219.873	34C	NH 18 – Echo Lake Beach, Peabody Slopes, Cannon Mountain	Southern terminus of NH 18
138.080			222.218		I‑93 north	Exit 35 on I-93; northern end of concurrency with I-93 and the Franconia Notch Parkway
139.044			223.770		NH 141 to I‑93 / NH 18 – Franconia	Eastern terminus of NH 141
Coos	Carroll	148.497	238.983		US 302 – Bethlehem, Bretton Woods, Conway	In village of Twin Mountain
		150.510	242.222		NH 115 – Jefferson, Berlin, Gorham	Southern terminus of NH 115
	Whitefield	156.871	252.459		NH 116 south / NH 142 south – Bethlehem, Littleton	Southern end of concurrency with NH 116 / NH 142
		156.918	252.535		NH 142 north – Dalton	Northern end of concurrency with NH 142
		156.959	252.601		NH 116 north – Jefferson, Gorham	Northern end of concurrency with NH 116
	Lancaster	165.330	266.073		US 2 east – Jefferson, Gorham, Berlin	Southern end of concurrency with US 2
		165.372	266.140		NH 135 – Dalton, Gilman VT	Northern terminus of NH 135
		166.126	267.354		US 2 west – St. Johnsbury VT	Northern end of concurrency with US 2
	Northumberland	175.152	281.880		NH 110 – Stark, Berlin	Western terminus of NH 110 in village of Groveton
	North Stratford	188.576	303.484		To VT 105 – Bloomfield VT
	Colebrook	201.458	324.215		NH 26 east – Dixville Notch	Southern end of concurrency with NH 26
		201.565	324.387		NH 26 west	Northern end of concurrency with NH 26
		201.647	324.519		NH 145 – Clarksville	Southern terminus of NH 145
	Pittsburg	219.573	353.368		NH 145	Northern terminus of NH 145
		241.953	389.386		Route 257	Continuation into Quebec
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access       Route transition

Special routes

US 3 has one existing special route, a business route through Laconia, New Hampshire. Three other special routes may have existed in the past: a business route between Tyngsborough, Massachusetts, and Concord, New Hampshire, and bypass routes around Concord and Nashua, New Hampshire.

Laconia business loop

U.S. Route 3 Business
Location:	Belmont, New Hampshire–Laconia, New Hampshire
Length:	4.144 mi[2] (6.669 km)

U.S. Route 3 Business is a 4.144-mile-long (6.669 km)^[2] long unsigned business route running north–south through downtown Laconia, New Hampshire. It runs from US 3 and New Hampshire Route 11 in Belmont north to US 3 in Laconia, along NH 107 and NH 11A.

See also

• Massachusetts portal
• New Hampshire portal
• U.S. Roads portal

Notes

References

External links

Wikimedia Commons has media related to U.S. Route 3.

• US 3/Northwest Expressway on Bostonroads.com
• Photos of US 3 in New Hampshire
• Current and Speculative Future US 3 in Mass. Exit List
• Endpoints of U.S. Highway 3

Browse numbered routes
← Route 2A	MA	Route 3 →
← US 2	NH	NH 3A →
← Route 5	N.E.	Route 6A →