
U.S. Route 3 |
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| Length | 277.00 mi[1] (445.79 km) |
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| Existed | 1926[1]–present |
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| South end |  Route 2A / Route 3 in Cambridge, Mass. |
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| Major intersections | Route 2 in Cambridge, Mass.
Route 16 in Cambridge, Mass.
Route 60 in Arlington, Mass.
 I‑95 / Route 128 in Burlington, Mass.
I‑495 in Chelmsford, Mass.
Everett Turnpike in Nashua, N.H.
NH 101 near Manchester, N.H.
US 4 near Concord, N.H.
I-93 in Franconia, N.H.
US 2 in Lancaster, N.H. |
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| North end | Route 257 near Chartierville, Quebec |
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| Country | United States |
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U.S. Route 3 is a highway that travels from Cambridge, Massachusetts to the Canadian border.
References
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Routes in italics are no longer a part of the system. Highlighted routes are considered main routes of the system. |