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Interstate 93
 Interstate 93 | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
 I-93 highlighted in red | ||||||||||
| Route information | ||||||||||
| Length | 189.95 mi[1] (305.69 km) | |||||||||
| Existed | 1957–present | |||||||||
| NHS | Entire route | |||||||||
| Restrictions | No hazardous goods and cargo tankers between exits 15B and 18 in Massachusetts[2] | |||||||||
| Major junctions | ||||||||||
| South end |    I-95 / US 1 / Route 128 in Canton, MA | |||||||||
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| North end |  I-91 in Waterford, VT | |||||||||
| Location | ||||||||||
| Country | United States | |||||||||
| States | Massachusetts, New Hampshire, Vermont | |||||||||
| Counties | MA: Norfolk, Suffolk, Middlesex, Essex NH: Rockingham, Hillsborough, Merrimack, Belknap, Grafton VT: Caledonia | |||||||||
| Highway system | ||||||||||
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Interstate 93 (I-93) is an Interstate Highway in the New England states of Massachusetts, New Hampshire, and Vermont in the United States. Spanning approximately 190 miles (310 km) along a north–south axis, it is one of three primary Interstate Highways located entirely within New England; the other two are I-89 and I-91. The largest cities along the route are Boston, and Manchester, New Hampshire; it also travels through the New Hampshire state capital of Concord.
I-93 begins at an interchange with I-95, US Route 1 (US 1) and Route 128 in Canton, Massachusetts. It travels concurrently with US 1 beginning in Canton, and, with Route 3 beginning at the Braintree Split on the Braintree–Quincy city line, through the Central Artery in Downtown Boston before each route splits off beyond the Leonard P. Zakim Bunker Hill Memorial Bridge. The portion of highway between the Braintree Split and the Central Artery is named the "Southeast Expressway", while the portion from Boston to the New Hampshire state line is named the "Northern Expressway".
I-93 ends in Saint Johnsbury, Vermont, at I-91.[3] For most of its length, I-93 indirectly parallels US 3. In New Hampshire, the two highways have several interchanges with each other, as well as a concurrency through Franconia Notch State Park.
- ^ Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Retrieved December 12, 2022.
- ^ "Hazardous material route designation". Mass.gov. Retrieved January 15, 2018.
- ^ "Interstate 93" (Map). Google Maps. Retrieved June 8, 2009.
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