In New Hampshire, current and former parts of US 3 are known as the Daniel Webster Highway. From Burlington, Massachusetts, to Nashua, New Hampshire, US 3 is a freeway. The segment in New Hampshire is a free portion of the Everett Turnpike, while the portion in Massachusetts is known as the Northwest Expressway. From where it leaves the Everett Turnpike in Nashua northwards, US 3 is generally a 2-4 lane at-grade road, though there are two super two freeway portions in northern New Hampshire, one on the Laconia Bypass, and one where US 3 and Interstate 93 use the Franconia Notch Parkway. The route serves as a major local arterial, connecting many of the cities of the densely populated Merrimack River Valley. North of the White Mountains, the route serves as one of the only north-south roads connecting the communities of the Great North Woods Region and has New Hampshire's only border crossing between the US and Canada.