U.S. Route 1 in New Hampshire

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This article is about the section of U.S. Route 1 in New Hampshire. For the entire length of the highway, see U.S. Route 1.

U.S. Route 1 marker

U.S. Route 1
Route information
Maintained by NHDOT
Length: 16.88 mi[1] (27.17 km)
Existed: 1926 – present
Major junctions
South end: US 1 in Salisbury, MA
  NH 101 in Hampton
US 1 Byp. in Portsmouth
North end: US 1 in Kittery, ME
Counties: Rockingham
Highway system

New Hampshire Routes

I-393 NH 1A
NH 1A NH Route 1B.svg US 2

In the U.S. state of New Hampshire, U.S. Route 1 is a major north–south state highway through Hampton and Portsmouth. It lies between Interstate 95 and New Hampshire Route 1A.

Route description[edit]

Memorial Bridge closure[edit]

Memorial Bridge in Portsmouth, New Hampshire, which carried U.S. Route 1 across the Piscataqua River before its closure in July 2011

The 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. Just over five months later, the bridge was closed to all travelers and the middle lift section was removed, leaving a gap in US 1.

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. The bridge initially opened to only pedestrians and bicyclists. The new bridge - constructed over two still existing piers - opened to vehicular traffic at 2:00 p.m first with southbound traffic (Maine to New Hampshire), and then northbound.

In the interim, access to US 1 on each side of the gap was facilitated by the Sarah Mildred Long Bridge, which carries US 1 Bypass, 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.


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

Junction list[edit]

County Location Mile km Destinations Notes
Rockingham Seabrook 0.0 0.0 US 1 (Lafayette Road) Massachusetts - New Hampshire state line.
1.5 2.4 NH 107 Southern terminus of NH 107.
To I‑95.
Hampton Falls 3.1 5.0 NH 84 (Kensington Road) Eastern terminus of NH 84.
3.2 5.1 NH 88 (Exeter Road) Eastern terminus of NH 88.
Hampton 4.9 7.9 NH 101 (Exeter-Hampton Expressway) Interchange. Northbound exits.
NB entrance from NH 101 west, SB entrance from NH 101 east.
To I‑95.
5.5 8.9 NH 101E (Winnacunnet Road) Western terminus of NH 101E.
5.7 9.2 NH 27 (Exeter Road/High Street)
North Hampton 7.0 11.3 NH 151 (Post Road) Southern terminus of NH 151.
8.1 13.0 NH 111 (Atlantic Avenue)
Portsmouth 14.7 23.7 US 1 Byp. Southern terminus of US-1 Bypass.
Northbound exit/southbound entrance ramps only.
To I-95.svgUS 4.svgSpaulding Turnpike.svgNH Route 16.svg I-95 and the Spaulding Turnpike.
15.5 24.9 NH 33 (Middle Road) Eastern terminus of NH 33.
16.0 25.7 NH 1A (Miller Avenue) Northern terminus of NH 1A.
16.7 26.9 NH 1B (Marcy Street) Northern terminus of NH 1B.
16.9 27.2 Memorial Bridge
US 1
Bridge closed in 2011; new bridge expected to be completed in 2013.
DETOURS: Must take US 1 Byp. north or I‑95 north
for access to US 1 in Maine.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Suffixed routes[edit]

New Hampshire Route 1A[edit]

New Hampshire Route 1A
Location: Seabrook-Portsmouth
Length: 18.32 mi[3] (29.48 km)

New Hampshire Route 1A is an 18.32-mile (29.48 km) long state highway located in southeast New Hampshire. The route runs along the Atlantic coastline from the Massachusetts border north to Rye, then turns toward downtown Portsmouth. The southern terminus is at the Massachusetts state line in Seabrook at the junction with Massachusetts' Route 1A. The northern terminus is at the junction with U.S. Route 1 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[edit]

New Hampshire Route 1B
Location: Portsmouth
Length: 4.89 mi[3] (7.87 km)

New Hampshire Route 1B (abbreviated NH 1B) is a 4.89-mile (7.87 km) long state highway in southeast New Hampshire.

The southern terminus is at New Hampshire Route 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 Portsmouth. The northern terminus is at the junction with U.S. Route 1 near the Maine state line.

See also[edit]

Related routes[edit]


Route map: Google / Bing

U.S. Route 1
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