U.S. Route 3
|Length:||277.90 mi (447.24 km)|
|Existed:||1926 – present|
|South end:||Route 2A / Route 3 in Cambridge, Mass.|
| Route 2 in Cambridge, Mass.
Route 16 in Cambridge, Mass.
Route 60 in Arlington, Mass.
I-95 / Route 128 in Burlington, Mass.
I-495 in Chelmsford, Mass.
Everett Tpke. in Nashua, N.H.
NH 101 near Manchester, N.H.
US 4 near Concord, N.H.
I-93 in Franconia, N.H.
US 2 in Lancaster, N.H.
|North end:||Route 257 near Chartierville, Quebec|
U.S. Route 3 (US 3) is a north–south United States highway that runs from its southern terminus in Cambridge, Massachusetts, through New Hampshire to its terminus near Third Connecticut Lake at the Canadian border, where the road continues north as 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 6.7 miles (10.8 km) in New Hampshire are a free portion of the Everett Turnpike.) A second freeway portion exists in northern New Hampshire, where US 3 utilizes the Franconia Notch Parkway and a short segment of Interstate 93, before proceeding on two-lane roads north to the border with Canada. While the southern terminus has not changed, there have been different northern termini to this route.
Route description 
In Massachusetts, US 3's freeway portion heading from Interstate 95/Route 128 to the New Hampshire border is numbered using the original exit numbering system from the days when US 3's freeway portion was to extend south of Route 128 to Boston to connect with Route 2 and the never-built Inner Belt (I-695). The numbering "begins" with Exit 25 at Route 128 and proceeds north. All other freeways which once used that system have been renumbered with more conventional exit numbers. Because of the cancellation of Route 3 as an expressway inside of Route 128, one travelling on Route 3 will travel along a wrong-way concurrency with I-95/Route 128 for a short while (going South on Route 3 is I-95/Route 128 North), as to link up the "old" Route 3 inside of the belt and the "new" Route 3 outside of it.
The "old" Route 3 runs south from I-95/Route 128 Exit 33, through portions of Burlington, Woburn, and Winchester, without intersecting any other numbered routes. In Arlington, it joins with Massachusetts Routes 2A and 60 in Arlington Center. The concurrency of Routes 2A, 3, and 60 is a three-way concurrency; for two blocks on Mystic Street, one is traveling south on US 3, east on Route 2A, and west on Route 60. At Massachusetts Avenue, US 3 and Route 2A turn east toward Boston until they reach the Alewife Brook Parkway and Route 16, at which point Route 3 joins those routes heading south. At the Alewife MBTA Station, Routes 3 and 16 join Route 2 and the Fresh Pond Parkway bearing south and east to Memorial Drive in Cambridge. The concurrency of Routes 2A, 3, and 16 is a three-way concurrency; between Alewife Station and Huron Avenue, one is traveling south on US 3, east on Route 2, and west on Route 16. US 3 ends on Memorial Drive at the point where it meets Massachusetts Route 3.
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. It is the only signed/numbered route in the state to extend fully from its southern border with Massachusetts to its northern border with Quebec; thus, it is also the longest route within New Hampshire, at 242 miles (389 km).
Route 3 crosses the New Hampshire-Massachusetts border, leaving the town of Tyngsborough, Massachusetts and entering the city of Nashua, New Hampshire, and becomes known as the Everett Turnpike. Route 3 leaves the Everett Turnpike at Exit 7E in Nashua 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. Many locals will erroneously refer to the Everett Turnpike from Exit 7 through the I-293 interchange as Route 3 and refer to the actual Route 3 only as the Daniel Webster Highway. Route 3 continues north through the town of Merrimack and into Bedford, where it becomes South River Road. Route 3 parallels Interstate 293 until it turns east, crossing the Merrimack River on Queen City Avenue approximately three-quarters of a mile north of the Bedford-Manchester line. After approximately three-quarters of a mile, Route 3 then turns north onto Elm Street in downtown Manchester. After approximately 2.2 miles (3.5 km) on Elm Street, Route 3 turns east onto Webster Street, then joins NH Route 28 to proceed in a northeasterly direction on another segment of the Daniel Webster Highway.
In Suncook, New Hampshire, Route 28 leaves to the northeast, and Route 3 proceeds northwest towards Concord on Pembroke Street, becoming Manchester Street when it enters the Concord city limits. Route 3 traverses downtown Concord, where it is known as North and South Main Street, then follows North State Street to Fisherville Road to Village Street in Penacook before crossing the Contoocook River into Boscawen. Route 3 travels north through Boscawen, briefly joining US 4. Route 3 parallels the Merrimack River north into Franklin. In Franklin, the route joins New Hampshire Route 11 and turns east, briefly coinciding with New Hampshire Route 127, and passing through Tilton, where it crosses NH 132 and passes the western end of NH 140. Continuing northeast past Winnisquam Lake, Routes 3 and 11 reach Laconia and turn onto the Laconia-Gilford Bypass, passing interchanges with New Hampshire Routes 106, 107, and 11A. At the north end of the bypass, Routes 3 and 11 diverge, with Route 3 continuing north on Lake Street to Weirs Beach and an intersection with 11B. Route 3 continues north as the Daniel Webster Highway to Meredith at the north end of Meredith Bay on Lake Winnipesaukee. In Meredith, after passing the northern terminus of NH 106, Route 3 joins NH 25 and continues north past Squam Lake into Holderness, passing the west ends of NH 25B and NH 113. Through Holderness, Routes 3 and 25 gradually turn west, then southwest, passing the southern end of NH 175, and then reaching the northern end of NH 132 in Ashland.
From Ashland to North Woodstock, Route 3 proceeds north, roughly paralleling I-93 in the Pemigewasset River valley. Along this stretch it passes through the towns of Plymouth (where NH 25 diverges to the west), West Campton (where it meets the western end of NH 49, the principal access road to Waterville Valley), Thornton, and Woodstock. In North Woodstock, Route 3 crosses NH 112 (also known as the Kancamagus Highway to the east). Continuing north, Route 3 joins with I-93 as it passes through Franconia Notch State Park, one of the more scenic drives in the White Mountains. It separates from I-93 shortly north of the northern park boundary in Franconia, about 1.5-mile (2.4 km) north of the exit with NH 18. From there, after NH 141 branches northwest, Route 3 heads north and east toward Twin Mountain and a junction with U.S. Route 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, Route 3 passes through the village of Carroll, where NH 115 branches to the northeast, and Route 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. Route 3 continues north to Lancaster, where it joins U.S. Route 2 in the town center, and where NH 135 branches left. After US 2 leaves to the west, Route 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, Route 3 continues to follow the river, through Stratford, North Stratford, and Columbia, until it reaches Colebrook, where New Hampshire Routes 26 and 145 begin. Still following the Connecticut River north, Route 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, where it meets the northern end of NH 145, eventually heading directly north to the Canadian border crossing at Chartierville, Quebec, where it becomes Quebec Route 257.
Prior to the U.S. Highway system, the section of US 3 from Orleans, Massachusetts to Colebrook, New Hampshire was part of New England Interstate Route 6 (NE-6). It was replaced in its entirety with the establishment of US 3 in 1926.
The modern expressway was begun around Massachusetts Route 110 at Lowell before World War II. In the 1950s, it was extended south to Route 128, and by the 1960s, it was completed north from Chelmsford to New Hampshire. In the first half of the first decade of the 21st century, the chronically congested four-lane road, largely with antiquated ramps around Lowell, was widened to six lanes (as it had been in Nashua, New Hampshire a few years previously) 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.
According to the AASHTO route log, the southern terminus of US 3 is at US 20 in Boston, after crossing the Charles River at the Boston University Bridge. However, MassDOT officially places the southern terminus 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). The original northern terminus (in 1926) was Colebrook, New Hampshire, but the highway was extended to West Stewartstown, New Hampshire in 1928, and to Pittsburg, New Hampshire in 1937. Colebrook was temporarily the northern terminus again from 1939 to 1940. Since 1940, the highway has run through Pittsburg to the New Hampshire-Quebec border.
Major intersections 
||This section contains a table that is missing mileposts for one or more junctions. Please help by|
||Cambridge||55.7||89.6|| Route 3 (Memorial Drive)
|Southern terminus of US 3; northern terminus of Route 3|
|56.8||91.4||Route 2 east (Boston University Bridge)||Southern end of Route 2 concurrency|
|59.7||96.1||Route 16 west||Southern terminus of Route 16 concurrency|
|61.2||98.5||Route 2 west (Concord Turnpike)||Northern end of Route 2 concurrency|
|61.5||99.0|| Route 16 east
Route 2A east
|Northern end of Route 16 concurrency; southern end of Route 2A concurrency|
|Arlington||62.9||101.2||Route 60||Brief concurrency with Route 60|
|63.2||101.7||Route 2A west||Northern end of Route 2A concurrency|
|Burlington||72.0||115.9||25|| I-95 / Route 128
|Southbound exit and northbound entrance; southern end of I-95/Route 128 concurrency; exit signed as 25A (north) and 25B (south)|
|Bedford||72.9||117.3||26||Route 62 – Burlington, Bedford|
|Billerica||76.1||122.5||27||Concord Road – Billerica, Bedford|
|77.5||124.7||28||Treble Cove Road – North Billerica, Carlisle|
|North Billerica||79.7||128.3||29||Route 129 – Billerica, Chelmsford|
I-495 – Lawrence, Marlborough
|Signed northbound as exits 30A (Lowell Connector), 30B (I-495 north, via Lowell Connector) and 30C (I-495 south);Northbound; exits 30A and 30B share collector ramp northbound
Signed southbound as exits 30A (I-495 north) and 30B (I-495 south) and shares a collector ramp with exit 31; access to Lowell Connector southbound is via I-495 north (exit 30A)
|81.5||131.2||31||Route 110 – Chelmsford||Exits 30C and 31 share collector ramps northbound; exits 31, 30B and 30A share collector ramp southbound|
|North Chelmsford||83.7||134.7||32||Route 4 – North Chelmsford, Chelmsford|
|85.8||138.1||33||Route 40 – Westford, North Chelmsford|
|Tyngsborough||88.0||141.6||34||Westford Road – Tyngsborough, Westford|
|89.6||144.2||35||Route 113 – Dunstable, Tyngsborough|
|91.0||146.5||36||Middlesex Road – South Nashua, NH||No southbound exit; entrance ramp to northbound US 3 crosses the state line and merges with the highway in New Hampshire|
|Massachusetts–New Hampshire state line|
||Nashua||0.50||0.80||1||Spit Brook Road – South Nashua|
|1.49||2.40||2||To NH 3A (Daniel Webster Highway) – Hudson, (Circumferential Highway||Ramp from exit 1 northbound collector-distributor lane numbered exit 1A|
|2.59||4.17||3||Daniel Webster Highway – South Nashua||Southbound exit and northbound entrance|
|3.18||5.12||4||East Dunstable Road||Formerly signed with FAA Center as destination; signage was removed at the request of the Federal Aviation Administration shortly after the September 11, 2001 attacks|
|4.69||7.55||5||NH 111 to NH 111A – Nashua, Hudson, Pepperell, MA||Signed as exits 5E and 5W|
|5.13||8.26||5A||Simon Street||Northbound exit only|
|6.22||10.01||6||NH 130 (Broad Street) – Hollis|
|6.74||10.85||7|| Everett Tpke. north
NH 101A – Nashua, Amherst, Milford
|Northern end of the Everett Turnpike concurrency; signed as exits 7E (US 3 north / NH 101A east) and 7W (NH 101A west; brief concurrency with NH 101A west|
|Merrimack||Everett Tpke.||Exit 10 on the Everett Turnpike via Industrial Drive|
|Everett Tpke.||Exit 11 on the Everett Turnpike via Greeley Street)|
|Everett Tpke. south||Exit 12 on the Everett Turnpike via Bedford Road; no access to Everett Turnpike north|
|Bedford||NH 101 to I-293 / Everett Tpke.||Access to the I-293/Everett Tpke. via Route 101 east|
|Manchester|| I-293 / Everett Tpke.
NH 3A north
|Exit 4 on I-293; eastern terminus of NH 114A; western end of NH 3A concurrency|
|NH 3A south||Eastern end of NH 3A concurrency|
|NH 28 south||Southern end of NH 28 concurrency|
||Hooksett||I-93||Exit 9 on I-93|
|NH 28A||Northern terminus of NH 28A|
|NH 27||Western terminus of NH 27|
|NH 28 Bypass||Northern terminus of NH 28 Bypass|
|Allenstown||NH 28 north||Northern end of NH 28 concurrency in village of Suncook|
|Concord||I-93||Exit 13 on I-93|
|NH 3A||Northern terminus of the southern segment of NH 3A|
|US 202 west / NH 9 west to NH 13||Southern end of US 202/NH 9 concurrency|
|NH 9 east to I-93||Northern end of NH 9 concurrency|
|I-393 east / US 202 east||Northern end of US 202 concurrency; western terminus of I-393|
|Boscawen||US 4 east||Southern end of US 4 concurrency near village of Penacook|
|US 4 west||Northern end of US 4 concurrency|
|Franklin||NH 127 south||Southern end of NH 127 concurrency|
|NH 3A / NH 11 west||Southern end of NH 11/NH 127 concurrency|
|NH 127 north||Northern end of NH 127 concurrency|
||Tilton||NH 132 south||Western end of NH 132 concurrency|
NH 140 east
|Exit 20 on I-93; western terminus of NH Route 140|
|NH 132 north||Eastern end of NH 132 concurrency|
|Belmont||NH 11A||Western terminus of NH 11A|
|Laconia||NH 106||Interchange; to NH 107, via NH 106 north|
|NH 107||Partial interchange; southbound exit and northbound entrance|
|NH 11 east||Northern end of NH 11 concurrency; to] NH 11C|
|Laconia||NH 107 south||Northern terminus of NH 107|
|NH 11B||Western terminus of NH 11B in village of Weirs Beach|
|Meredith||NH 106||Northern terminus of NH 106|
|NH 104||Eastern terminus of NH 104|
|NH 25 east||Southern end of NH 25 concurrency|
|Center Harbor||NH 25B||Western terminus of NH 25B|
||Holderness||NH 113||Southern terminus of NH 113|
|NH 175||Southern terminus of NH 175|
|Ashland||NH 132||Northern terminus of NH 132|
|I-93||Exit 24 on I-93|
|Plymouth||NH 175A||Western terminus of NH 175A|
| NH 3A
NH 25 west
|Interchange; northern end of NH 25 concurrency; to I-93 via NH 3A north|
|Campton||I-93||Exit 27 on I-93 via Blair Road|
|NH 49||Western terminus of NH 49|
|Thornton||I-93||Exit 29 on I-93|
|Woodstock||I-93||Exit 30 on I-93|
|NH 175||Northern terminus of NH 175|
|Lincoln||I-93||Exit 33 on I-93|
|34A||I-93 north||Partial interchange for exit 34A on I-93 interchange; southern end of I-93 concurrency and the Franconia Notch Parkway|
|Franconia||34B||Cannon Mountain Tramway – Old Man Historic Site|
|34C||NH 18 – Echo Lake Beach, Peabody Slopes, Cannon Mountain||Southern terminus of NH 18|
|35||I-93 north||Northbound exit and southbound entrance; northern end of I-93 concurrency and Franconia Notch Parkway|
|NH 141||Eastern terminus of NH 141; to I-93 north|
||Carroll||US 302||In village of Twin Mountain|
|NH 115||Southern terminus of NH 115|
|Whitefield||NH 116 / NH 142||Brief concurrency with NH 116/NH 142|
|Lancaster||US 2 east||Southern end of US 2 concurrency|
|NH 135||Northern terminus of NH 135|
|US 2 west||Northern end of US 2 concurrency; to Vermont Route 102|
|Northumberland||NH 110||Western terminus of NH 110 in village of Groveton|
|Colebrook||NH 26 south||Southern end of NH 26 concurrency|
|NH 26 north||Northern end of NH 26 concurrency; to Vermont Route 26/Route 102|
|NH 145||Southern terminus of NH 145|
|Pittsburg||NH 145||Northern terminus of NH 145|
|242.20||389.78||Route 257||Northern terminus of US 3, roadway continues into Quebec as Route 257|
Bannered routes 
Laconia business loop 
U.S. Route 3 Business
|Location:||Laconia, New Hampshire|
U.S. Route 3 Business is a 4.20-mile (6.76 km) long business route running north–south through downtown Laconia, New Hampshire. It runs from US 3 in Laconia south to US 3 and NH 11 in Belmont, New Hampshire along New Hampshire Route 107 and New Hampshire Route 11A.
See also 
- US Highways From US 1 to US 830 Robert V. Droz
- 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.
- Staff (2007). "Interchange Lists (US 3)". Massachusetts Executive Office of Transportation. Retrieved August 7, 2011.
- Complex Systems Research Center, Institute for the Study of Earth, Oceans, and Space. "NH GRANIT". University of New Hampshire. Retrieved June 30, 2011.
- New Hampshire Routes 1-25[dead link]
|Wikimedia Commons has media related to: U.S. Route 3|
|Browse numbered routes|
|← Route 2A||MA||Route 3 →|
|← US 2||NH||NH 3A →|
|← Route 5||N.E.||Route 6A →|