Chesterfield to Concord NH 9 begins in the west where
VT 9 crosses the
Connecticut River from
Brattleboro, Vermont, into
Chesterfield, New Hampshire on the
United States Navy Seabees Bridge. The highway meanders its way through the large town (by area) en route to
Keene, home of
Keene State College. NH 9 enters the southern part of the city and intersects with the triplex of
NH 10,
NH 12, and
NH 101, the latter of which has its western terminus here. NH 9 joins NH 10 and NH 12, bypassing downtown Keene to the west. After about a mile, NH 12 splits off to the northwest. Two miles later, NH 10 follows suit and NH 9 continues northeast, crossing through parts of
Roxbury,
Sullivan, and
Nelson en route to
Stoddard, where NH 9 intersects with
NH 123. The two routes overlap for about a mile before NH 123 splits northwest, while NH 9 continues east. The highway passes along the northern edge of
Antrim, intersecting and overlapping with
NH 31. The two routes cross into the town of
Hillsborough, where NH 31 splits off to the northwest and NH 9 becomes a semi-
limited access highway (not quite up to
super-two standards due to a number of at-grade intersections). One mile (1.6 km) to the east, NH 9 interchanges with
US 202 and the two routes form the first of two lengthy
concurrencies. US 202 and NH 9 bypass downtown Hillsborough to the north, as well as the neighboring town of
Henniker, before entering
Hopkinton. US 202 and NH 9 intersect
NH 127 near the town line and continue east to one of two partial interchanges with
I-89. The first interchange allows the following movements: US 202/NH 9 east to I-89 south, US 202/NH 9 west to I-89 north, I-89 north to US 202/NH 9 west, and I-89 south to both directions of US 202/NH 9. The highway continues into town, intersecting the southern terminus of
NH 103 (a secondary highway paralleling I-89 north) before intersecting I-89 again, with southbound-only access to the
Interstate highway. US 202 and NH 9 enter the city of
Concord from the west and roughly parallel I-89 until reaching downtown. The two highways intersect the northern terminus of
NH 13 before meeting
US 3 downtown. US 202 and NH 9 turn north onto US 3 for about six blocks before NH 9 turns east onto Loudon Road, intersecting with
I-93 (US 202 continues along US 3 to meet
I-393 just to the north). NH 9 runs as Loudon Road parallel to I-393 (which also carries
US 4 and US 202), with access possible via
NH 132 (East Side Drive) and
NH 106 (Sheep Davis Road - NH 106 is also the route to
New Hampshire Motor Speedway, which lies to the north). NH 9 crosses underneath I-393 and enters the extreme northern tip of
Pembroke.
Pembroke to Somersworth Upon crossing into Pembroke, I-393 ends and merges with NH 9. US 202 rejoins NH 9 at this point, as does US 4, and the triplex of routes immediately crosses into
Chichester, followed by
Epsom. The highway intersects with
NH 28 at the Epsom Traffic Circle and continues eastward. Just feet before crossing into
Northwood,
NH 107 intersects with US 4, US 202, and NH 9, forming a four-route concurrency. After two miles, NH 107 splits off to the north while US 4, US 202, and NH 9 continue into Northwood. In the eastern part of town, the highway reaches an intersection with
NH 43. At this intersection, US 202 and NH 9 split off US 4 towards
Rochester, with US 4 continuing southeast towards
Durham and
Portsmouth. US 202 and NH 9 meet the western terminus of
NH 202A (an alternate of US 202 toward Rochester), nick the extreme northwestern corner of
Nottingham, and enter
Barrington. In Barrington, US 202 and NH 9 split again; US 202 heads northeast towards Rochester, and NH 9 turns southeast, crossing
NH 125 en route to
Dover. NH 9 enters Dover from the southwest and intersects the northern terminus of
NH 155, then turns northeast and immediately interchanges with the
Spaulding Turnpike (
NH 16) at exit 8. NH 9 continues into the heart of Dover as Silver Street and meets up with
NH 108 (Central Avenue).
NH 4 has its western terminus here. NH 9 and NH 108 traverse downtown Dover, with NH 4 splitting off towards
Rollinsford along the way. The two routes split at the end of Central Avenue, north of downtown. Access to the Spaulding Turnpike exit 9 is available at this intersection NH 9 turns northeast and enters
Somersworth. The road continues towards the
Salmon Falls River at the heart of the city and intersects
NH 236. NH 9 and NH 236 are cosigned along High and Market Streets in the downtown area. NH 9 crosses the Salmon Falls River into
Berwick, Maine, and becomes
Maine State Route 9. NH 236 ends at the border and is not directly connected to
Maine State Route 236, but the two are linked via SR 9. ==History==