U.S. Route 1 in New Hampshire

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U.S. Route 1

US 1 highlighted in red
Route information
Maintained by NHDOT
Length17.044 mi[1] (27.430 km)
Major junctions
South end US 1 in Salisbury, MA
Major intersections NH 101 in Hampton
US 1 Byp. in Portsmouth
North end US 1 in Kittery, ME
CountryUnited States
StateNew Hampshire
Highway system
I-393 NH 1A
NH 1ANH Route 1B.svg US 2

U.S. Route 1 (US 1) is a north–south U.S. Route is the U.S. state of New Hampshire through Hampton and Portsmouth. It lies between Interstate 95 (I-95) and New Hampshire Route 1A (NH 1A).

Route description


US 1 follows the historic Lafayette Road through New Hampshire, named after the Gilbert du Motier, Marquis de Lafayette, who passed over the road in 1825.[2]

MA Route 17.svg

For a period of time during the 1950s, a segment of US 1 in Massachusetts and New Hampshire was routed onto what later became I-95. Roadway that had been US 1 was designated as Route 17 from Danvers to Salisbury[3] and NH 17 for a short distance in Seabrook.[4] Once the I-95 designation was adopted, Route 17 and NH 17 were restored to being US 1.

Memorial Bridge replacement

The old Memorial Bridge in Porthsmouth, which carried US 1 across the Piscataqua River before its closure in July 2011. It was replaced by a newer drawbridge which opened in August 2013.

The original Memorial Bridge, which formerly carried US 1 over the Piscataqua River between New Hampshire and Maine, was closed to motorists in July 2011 due to numerous safety and structural concerns. This was a permanent closure following two instances in 2009 and 2010 when the bridge was closed for emergency repairs. The bridge was, however, left open to pedestrians and bicyclists, as it was the only of the three river bridges allowing for these methods of travel. On January 9, 2012, the bridge was closed to pedestrians and cyclists as well. The middle lift section was removed on February 8, leaving a 300-foot (91 m) gap in US 1.

Over the next two years, the bridge was demolished and removed, and a new drawbridge was constructed in its place. In the interim, access to US 1 on each side of the gap was facilitated by either the Sarah Mildred Long Bridge, which carries US 1 Bypass (US 1 Byp.), or the Piscataqua River Bridge which carries I-95. The New Hampshire Department of Transportation operated hourly shuttle service between Portsmouth and Kittery while the new bridge was constructed.

The new bridge was officially dedicated at a ceremony on the New Hampshire side of the span just before noon on August 8, 2013. Former Portsmouth Mayor Eileen Foley cut the red ribbon, 90 years after she performed the same honors for the original span in 1923 when she was five years old.[5] The bridge initially opened to only pedestrians and bicyclists. The new bridge—constructed over two previously existing piers—opened to vehicular traffic at 2:00 pm first with southbound traffic (Maine to New Hampshire), then northbound. Finishing work on the bridge was completed in late 2013.

Major intersections

The entire route is in Rockingham County. [1][6]

US 1 south (Lafayette Road) – Salisbury, Newburyport
Continuation into Massachusetts

NH 107 north to I-95 – Kingston, Boston, MA
Southern terminus of NH 107
Hampton Falls3.0824.960
NH 84 west (Kensington Road) – Kensington
Eastern terminus of NH 84
NH 88 west (Exeter Road) – Exeter
Eastern terminus of NH 88

NH 101 to I-95 / NH 1A – Exeter, Manchester, Hampton Beach
NH 101E east (Winnacunnet Road)
Western terminus of NH 101E
5.6759.133 NH 27 (Exeter Road/High Street) – Exeter, Hampton Beach
NH 151 north (Post Road) – Greenland
Southern terminus of NH 151.
North Hampton7.99612.868 NH 111 (Atlantic Avenue) – Exeter, Rye Beach
US 1 Byp. north / I-95 / US 4 / NH 16 – Dover, Maine
Southern terminus of US 1 Bypass
NH 33 west (Middle Road)
Eastern terminus of NH 33 (unsigned)
NH 1A south (Miller Avenue)
Northern terminus of NH 1A (unsigned)
NH 1B south (Marcy Street) – New Castle
Northern terminus of NH 1B (unsigned)
Memorial Bridge over Piscataqua River
US 1 north – Kittery
Continuation into Maine
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Auxiliary routes

U.S. Route 1 Bypass

U.S. Route 1 Bypass

LocationPortsmouthKittery, Maine
Length4.3 mi[7] (6.9 km)

U.S. Route 1 Bypass (US 1 Byp.) is a 4.3-mile (6.9 km) bypass of US 1 in Portsmouth and Kittery, Maine. The route runs for 2.7 miles (4.3 km) in New Hampshire and is mostly a four-lane divided semi-limited-access freeway, although two four-way traffic signals are present south of the Portsmouth traffic circle. The southern terminus is at US 1 (Lafayette Road) just south of downtown. The highway continues northwest to the traffic circle, where it then turns northeast. US 1 Byp. crosses the Sarah Mildred Long Bridge and continues into Kittery, Maine.

New Hampshire Route 1A

New Hampshire Route 1A

Length18.32 mi[7] (29.48 km)

New Hampshire Route 1A (NH 1A) is an 18.32-mile (29.48 km) auxiliary of US 1 which runs along the Atlantic coastline. It runs from the Massachusetts border north to Rye, then turns toward downtown Portsmouth. The southern terminus of NH 1A is at the state line in Seabrook where it continues south as Route 1A. The northern terminus is at the junction with US 1 (Lafayette Road) in Portsmouth. For the length of the road’s run along the shore, its local name is Ocean Boulevard. In Portsmouth, it is known as Miller Avenue and Sagamore Avenue.

New Hampshire Route 1B

New Hampshire Route 1B

Length4.808 mi[1] (7.738 km)

New Hampshire Route 1B (NH 1B) is a 4.808-mile (7.738 km) auxiliary of US 1 serving the town of New Castle.

The southern terminus is at NH 1A in Portsmouth, near the city's southeastern boundary. The road loops around over Great Island in the Piscataqua River through New Castle and then back into downtown Portsmouth. The northern terminus is at the junction with US 1 at Prescott Park, near the Maine state line. The highway is signed north–south but forms a half-loop for most of its route.

Due to US 1 being routed onto the Memorial Bridge adjacent to the intersection with NH 1B, traffic from NH 1B must loop around State Street and Harbor Place to access US 1 in either direction. Harbor Place defaults onto Daniel Street, which carries US 1 south into Market Square. A hard left onto Wight Avenue will cross over to US 1 north to Maine. Southbound traffic on US 1 must use Chapel and State streets to access NH 1B.

Junction list

The entire route is in Rockingham County. [1][6]

Portsmouth0.0000.000 NH 1A (Sagamore Avenue) – Rye, PortsmouthSouthern terminus of NH 1B
4.8087.738 US 1 (State Street / Daniel Street) – Portsmouth, Kittery, MENorthern terminus of NH 1B;
access is via intersecting streets (see above)
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Related routes


  1. ^ a b c d e f Bureau of Planning & Community Assistance (February 20, 2015). "NH Public Roads". Concord, New Hampshire: New Hampshire Department of Transportation. Retrieved April 7, 2015.
  2. ^ Langdon B. Parsons, History of the Town of Rye, New Hampshire, from Its Discovery and Settlement to December 31, 1903, 1905, p. 203
  3. ^ "Mt. Ann Park Reservation in West Gloucester". The Boston Globe. June 3, 1956. p. 92. Retrieved April 11, 2020 – via newspapers.com.
  4. ^ "(advertisement)". The Portsmouth Herald. Portsmouth, New Hampshire. January 10, 1956. p. 5. Retrieved April 11, 2020 – via newspapers.com.
  5. ^ Haas, Kimberly (February 22, 2016). "Ex-Portsmouth Mayor Eileen Foley dies; city, state officials mourn". New Hampshire Union Leader. Archived from the original on February 23, 2016. Retrieved March 6, 2016.
  6. ^ a b c d Bureau of Planning & Community Assistance (April 3, 2015). "Nodal Reference 2015, State of New Hampshire". New Hampshire Department of Transportation. Retrieved April 7, 2015.[permanent dead link]
  7. ^ a b New Hampshire Routes 1-25

External links

U.S. Route 1
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