U.S. Route 3 (US 3) is a United States highway running 277.9 miles (447.2 km) from Cambridge, Massachusetts, through New Hampshire, to the Canadian border near Third Connecticut Lake, where it connects to Quebec Route 257.In New Hampshire, parts of US 3 are known as the Daniel Webster Highway. From Burlington, Massachusetts, to Nashua, New Hampshire, US 3 is a freeway.
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