U.S. Route 1 Bypass (Portsmouth, New Hampshire–Kittery, Maine)
| Route information | |
|---|---|
| Auxiliary route of US 1 | |
| Length | 4.32 mi (6.95 km) |
| Existed | 1940–present |
| Major junctions | |
| South end | US 1 in Portsmouth, NH |
| I-95 / US 4 / NH 16 / Spaulding Turnpike in Portsmouth, NH | |
| North end | US 1 in Kittery, ME |
| Location | |
| Country | United States |
| Counties | Rockingham (NH), York (ME) |
| Highway system | |
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U.S. Route 1 Bypass (US 1 Byp.) is a 4.3-mile-long (6.9 km) bypass of U.S. Route 1 in Portsmouth, New Hampshire and Kittery, Maine. Most of its north section, northeast of the Portsmouth Traffic Circle where it meets the Blue Star Turnpike (Interstate 95 or I-95) and Spaulding Turnpike, is built to rudimentary freeway standards, with no cross traffic but driveway access. The southern portion is similarly constructed, although there are two four-way intersections with traffic lights just south of the circle and a third at its south end, just before intersecting with US 1.