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Interstate 95 in New Hampshire

Interstate 95 (I-95), the main Interstate Highway on the east coast of the United States, cuts through the Seacoast Region of New Hampshire. The majority of it, from the Massachusetts border to the Portsmouth Circle in Portsmouth, is the 14.29-mile-long (23.00 km)[2] Blue Star Turnpike or New Hampshire Turnpike, a toll road maintained by the New Hampshire Department of Transportation (NHDOT) Bureau of Turnpikes. The final piece in Portsmouth splits from the turnpike south of the circle, running 2.42 miles (3.89 km)[2] to the Piscataqua River Bridge, a steel arch bridge, towards Maine and the Maine Turnpike. In its short length through New Hampshire, Interstate 95 traverses six municipalities - Seabrook, Hampton Falls, Hampton, North Hampton, Greenland, and Portsmouth.

Interstate 95 marker Blue Star Turnpike toll marker

Interstate 95
Blue Star Turnpike
I-95 highlighted in red
Route information
Maintained by NHDOT
Length16.193 mi[1] (26.060 km)
Major junctions
South end I‑95 in Salisbury, MA
North end I-95 in Kittery, ME
Highway system
I-93NH 97

Route descriptionEdit

View south along I-95 just after crossing the Piscataqua River Bridge from Maine

I-95 crosses from Massachusetts into New Hampshire in the town of Seabrook. There is a welcome center just north of the Massachusetts state line. The Seabrook Nuclear Power Plant is accessible via exit 1. The highway then continues through the coast towns of Hampton Falls and Hampton, with state-run liquor stores just prior to exit 2. I-95 interchanges with New Hampshire Route 101 (NH 101) in Hampton, then comes to a toll plaza soon after. That interchange also contains a ramp toll used by all traffic passing between the turnpike and NH 101. Traffic using the turnpike that does not pass by or use exit 2 pays no toll.

I-95 then continues through the towns of North Hampton and Greenland before entering the city of Portsmouth. Near the north end, a connection to the Portsmouth Circle provides access to U.S. Route 1 Bypass (US 1 Byp.) and the Spaulding Turnpike (US 4/NH 16). I-95 crosses into Maine less than 2 miles (3.2 km) from the Portsmouth Circle.


The turnpike opened in 1950 as a four-lane highway parallel to US 1 and was widened to eight lanes in 1976. The blue turnpike shield for the New Hampshire Turnpike is no longer in use, but was similar to the present-day signs for the Spaulding Turnpike and Everett Turnpike.[3]

From its designation in 1957 until 1972, I-95 in Portsmouth did not connect to I-95 in Kittery, Maine. Instead, the expressway ended at the Portsmouth Circle. From there, motorists followed US 1 Bypass via the Sarah Mildred Long Bridge to a junction near the Kittery Circle with US 1. This bridge connected the New Hampshire and Maine Turnpikes. It was a drawbridge over the Piscataqua waterway, which created problems on busy days with frequent ship traffic. Not only was this an obstacle to traffic, but the bridge was a narrow three-lane undivided roadway where the center lane could either be used in the direction of the greatest traffic flow or left closed for greater safety. Lane identification was accomplished via repeated banks of three traffic lights, one over each lane, and was the reason for the third (center) traffic light on the bridge. This bridge has since been replaced by another drawbridge with the same name.

Furthermore, US 1 Bypass is not a controlled-access highway, but an all-access divided highway (similar to US 1 between Saugus and Boston in Massachusetts). As far as most motorists were concerned, I-95 ended at the Portsmouth Circle and restarted in Kittery. The Piscataqua River Bridge, which is not a drawbridge unlike the Long Bridge, was completed in the 1970s to correct this problem. Three construction workers fell to their deaths in the construction of the bridge.

Exit listEdit

Exit numbers are sequential. The entire route is in Rockingham County. [1][4]

New HampshireMassachusetts line0.0000.000  I‑95 south – BostonContinuation into Massachusetts
60  Route 286 – Beaches, Salisbury MA, Massachusetts Visitor CenterSouthbound exit originates in New Hampshire, extends into Massachusetts. Exit number based on Massachusetts numbering. Will become Exit 90 when Massachusetts renumbers its exits beginning in 2020
Seabrook0.6621.0651  NH 107 – Seabrook, Kingston
Hampton5.4658.7952  NH 101 – Exeter, Hampton, Hampton Beach, ManchesterHampton Side Toll Plaza
5.7779.297Hampton Main Toll Plaza
Portsmouth12.45120.0383  NH 33 – Greenland, PortsmouthSigned as exit 3B southbound
13.22521.2843A   Pease International Tradeport, Park & Ride, Bus TerminalSouthbound exit only
13.32921.4514    Spaulding Turnpike / US 4 / NH 16 – New Hampshire Lakes, White Mountains, Newington, DoverNorthbound left exit and southbound entrance
13.83622.2675  US 1 Byp. (Portsmouth Circle)Northbound signage
14.46223.274    Spaulding Turnpike / US 4 / NH 16 – Newington, Dover, Durham, ConcordSouthbound signage
14.56523.4406Woodbury Avenue – PortsmouthNorthbound exit only
15.42124.8187Market Street – Downtown PortsmouthNorthbound signage
Woodbury Avenue / Market StreetSouthbound signage
16.19326.060  I-95 north – All Maine PointsContinuation into Maine
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b c Bureau of Planning & Community Assistance (February 20, 2015). "NH Public Roads". Concord, New Hampshire: New Hampshire Department of Transportation. Retrieved April 7, 2015.
  2. ^ a b GRANIT Archived 2013-08-03 at the Wayback Machine GIS data - NH Public Roads
  3. ^ Michael Summa, 1976 sign photo
  4. ^ a b 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]

External linksEdit