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New Hampshire Route 3A
 New Hampshire Route 3A | ||||
|---|---|---|---|---|
 Route 3A highlighted in blue | ||||
| Route information | ||||
| Auxiliary route of US 3 | ||||
| Maintained by NHDOT | ||||
| Southern segment | ||||
| Length | 39.412 mi[1] (63.427 km) | |||
| South end |  Route 3A at the Massachusetts state line | |||
| Major intersections |
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| North end |  US 3 in Concord | |||
| Northern segment | ||||
| Length | 31.015 mi[1] (49.914 km) | |||
| South end |   US 3 / NH 11 / NH 127 in Franklin | |||
| Major intersections |  US 3 / NH 25 in Plymouth | |||
| North end |  I-93 in Plymouth | |||
| Location | ||||
| Country | United States | |||
| State | New Hampshire | |||
| Counties | Hillsborough, Merrimack, Grafton | |||
| Highway system | ||||
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New Hampshire Route 3A is a designation held by two separate state highways in New Hampshire. The two segments, although not directly connected, are linked by U.S. Route 3, from which they derive their route number.
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