Editing Interstate 89 (section)

===New Hampshire===
[[File:MontcalmNH.jpg|thumb|300px|right|New Hampshire exit&nbsp;15 ([[Montcalm, New Hampshire|Montcalm]]), looking south]]
I-89 runs for about {{convert|61|mi|km}} in the state of New Hampshire and is the major freeway corridor through the western part of the state. Despite being signed as a north–south freeway, its first {{convert|8|mi|km|spell=in}} actually run east–west before shifting to the northwest. The two major population centers along I-89's length in New Hampshire are [[Concord, New Hampshire|Concord]], at its southern terminus, and [[Lebanon, New Hampshire|Lebanon]], on the Vermont state line. Mileage signs along I-89 in each direction consistently list one of the two cities. Also located along I-89 in New Hampshire are the towns of [[Grantham, New Hampshire|Grantham]], [[New London, New Hampshire|New London]], and [[Warner, New Hampshire|Warner]].

Starting at an interchange with [[Interstate 93|I-93]] and [[New Hampshire Route 3A]] (NH 3A) in the town of [[Bow, New Hampshire|Bow]], just south of the [[New Hampshire]] capital city of Concord, the highway runs a northwest path through the [[Dartmouth–Lake Sunapee Region]]. One exit directly serves Concord (exit 2) before the highway enters the neighboring town of [[Hopkinton, New Hampshire|Hopkinton]]. East–west [[New Hampshire Route 11|NH 11]] joins I-89 at exit 11 and runs concurrently with it for about {{convert|3|mi|km|spell=in}} before departing at exit 12. At exit 13 in Grantham, [[New Hampshire Route 10|NH 10]] enters I-89, and the pair of highways form another concurrency, this one for about {{convert|15|mi|km}}.

Southeast of Lebanon, signs for exit 15 display the name "Montcalm", while exit 16 directs travelers to "Purmort". Neither place name existed at the time of construction of the Interstate. Exits 15 and 16 were built to access portions of the town of [[Enfield, New Hampshire|Enfield]] that were otherwise cut off by the new highway. The names were chosen by Enfield's [[selectpeople]] in 1960; the Purmorts were a prominent local family in the early history of Enfield, and Montcalm was a nearby settlement that had once had its own school and post office.<ref>Janice Aitkin, [https://news.google.com/newspapers?id=wqUrAAAAIBAJ&sjid=0PwFAAAAIBAJ&pg=5358%2C4653065 "The towns that can't be found: Exits say Purmort and Montcalm -- but where are they?"], ''The Nashua Telegraph'', 5/22/82 p. 2</ref> While the Purmort exit does allow access to the state road network (specifically to [[U.S. Route 4|US&nbsp;4]] via Eastman Hill Road), the Montcalm exit provides access to an otherwise isolated community; every public road from the exit is a dead-end, and leaving the Montcalm area by car requires getting back on I-89 at exit&nbsp;15. However, a [[bicycle path]] parallels I-89 between exits&nbsp;14 and 16 along the path of Old Route&nbsp;10, allowing foot or bicycle access to the community.

The highway continues northwest, passing through Lebanon, in which the [[Dartmouth–Hitchcock Medical Center]] is located. A few miles north of this point is [[Dartmouth College]]. US&nbsp;4 parallels I-89 through Lebanon. Exits&nbsp;17 through 20 serve the city of Lebanon and are passed in quick succession. At exit&nbsp;19, northbound [[New Hampshire Route 10|NH&nbsp;10]] separates from I-89 and joins westbound US&nbsp;4 to pass through [[West Lebanon, New Hampshire|West Lebanon]]. The final exit in New Hampshire is exit&nbsp;20, providing access to West Lebanon's large retail district along [[New Hampshire Route 12A|NH&nbsp;12A]]. Just after this interchange, the highway crosses the [[Connecticut River]] and enters [[Vermont]], where it remains for the rest of its run northwest to the Canadian border.