- Direction:
- North/South
- Southern Terminus:
- Massachusetts-New Hampshire state line
- Northern Terminus:
- New Hampshire-Vermont state line
- Distance:
- 131.65 miles
- Counties:
- Rockingham, Hillsborough, Merrimack, Belknap, Grafton
- Signed:
- Yes
I-93 is a major north/south highway through New Hampshire. It enters the state from Massachusetts north of Boston. It runs north through Manchester to Hooksett, where it joins the Everett Turnpike, a toll highway that extends from the state line to the state capital in Concord. The turnpike is designated I-293 for a few miles south of where I-93 joins it. In Concord, the turnpike ends, and I-93 continues as a free highway.
Another particularly interesting section of I-93 is the Franconia Notch Parkway, the section where it passes through Franconia Notch State Park. In this area, the highway passes between mountains where it is too narrows to fit four lanes of traffic. Therefore, it narrows down to a single lane in each direction, violating the rules that interstates are generally required to follow. North of the park, I-93 widens back to four lanes and continues a short distance further before crossing the Connecticut River to Vermont, where it ends at I-91.
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