New Hampshire Route 18

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"NH 18" redirects here. NH 18 may also refer to Indian National Highway 18.

New Hampshire Route 18 marker

New Hampshire Route 18
Map of New Hampshire Route 18
Map of Grafton County in northwestern New Hampshire with NH 18 highlighted in red
Route information
Maintained by NHDOT
Length: 20.116 mi[1] (32.374 km)
Major junctions
South end: I‑93 / US 3 in Franconia
North end: VT 18 in Waterford, VT
Counties: Grafton
Highway system
NH 16B NH 25

New Hampshire Route 18 is a 20.116-mile-long (32.374 km) state highway in northwestern New Hampshire. It is a local road serving Franconia, Bethlehem, and Littleton, New Hampshire, which I-93 bypasses. Its northern extension, Vermont Route 18, continues northward from the Connecticut River to St. Johnsbury, Vermont. NH 18 closely parallels I-93 for its entire length and has several interchanges with the Interstate highway.

Route description[edit]

NH 18 begins as a spur of I-93 (the Franconia Notch Parkway) at the height of land in Franconia Notch. (U.S. Route 3 is overlapped with I-93 on the Parkway.) NH 18 proceeds to the northwest, intersecting NH 141 and NH 142, near its interchange with I-93. In downtown Franconia, NH 18 joins with NH 116 and meets the eastern end of NH 117 before leaving town and crossing into Bethlehem. NH 18 has two interchanges with I-93 in Bethlehem, joining U.S. Route 302 westbound at the second one (US 302 east provides access to downtown). The highway crosses into Littleton, splitting with NH 116 in the center of town. Just west of downtown, US 302 splits from NH 18 as well. (This intersection is signed as the northern terminus of NH 10, although this designation officially ends much further south.) Northwest of town, NH 18 joins NH 135 near another interchange with I-93. The two routes have a direct interchange with I-93 near the Connecticut River at exit 44 (I-93's last exit in New Hampshire). NH 135 splits off NH 18 before it crosses the river into Vermont (along with I-93 to its west) and becomes VT 18.

Junction list[edit]

The entire route is in Grafton County. [1][2]

Location[1][2] mi[1][2] km Destinations Notes
Franconia 0.000–
I‑93 / US 3 (Franconia Notch Parkway) Southern terminus; Exit 34C on I-93
2.804 4.513 NH 141 (Butterhill Road) – Twin Mountain Western terminus of NH 141
4.070 6.550 NH 142 (Forest Hill Road) to I‑93 south – Bethlehem Southern terminus of NH 142
4.825 7.765 NH 116 south (Easton Road) – Easton, Littleton, Plymouth
Wallace Hill Road to I‑93
Southern end of concurrency with NH 116; Exit 38 on I-93
5.300 8.530 NH 117 (Sugar Hill Road) – Sugar Hill Eastern terminus of NH 117
Bethlehem 7.533–
I‑93 north (Styles Bridges Highway) – Littleton Exit 39 on I-93
9.525 15.329 I‑93 (Styles Bridges Highway) / US 302 east (Main Street) – Bethlehem, Littleton, St. Johnsbury, VT, Franconia, Plymouth Southern end of concurrency with US 302; Exit 40 on I-93
Littleton 11.826 19.032 NH 116 north (Union Street) – Whitefield, Berlin Northern end of concurrency with NH 116
12.382 19.927 US 302 west (Meadow Street) to I‑93 – Lisbon, Woodsville
Also signed as NH 10 south.
Northern end of concurrency with US 302
14.016 22.557 NH 135 north (North Littleton Road) – Dalton Southern end of wrong-way concurrency with NH 135
I‑93 (Styles Bridges Highway) – Littleton, Plymouth, St. Johnsbury, VT Exit 44 on I-93
19.831 31.915 NH 135 south (Monroe Road) – Woodsville, Monroe Northern end of wrong-way concurrency with NH 135
20.116 32.374 VT 18 – Waterford Continuation into Vermont
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Road names along route[edit]

NH Route 18 uses the following local road names:

  • Profile Road
  • Main Street
  • Profile Road/Old Franconia Road
  • Main Street/Dartmouth College Road
  • Bethlehem Road
  • Cottage Street
  • Main Street
  • St. Johnsbury Road


  1. ^ a b c Bureau of Planning & Community Assistance (February 20, 2015). "NH Public Roads". Concord, New Hampshire: New Hampshire Department of Transportation. Retrieved April 7, 2015. 
  2. ^ a b Bureau of Planning & Community Assistance (April 3, 2015). "Nodal Reference 2015, State of New Hampshire". New Hampshire Department of Transportation. Retrieved April 7, 2015. 

External links[edit]

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