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: 20.13 mi[1] (32.40 km)
Major junctions
South end: I‑93 / US 3 in Franconia
  I‑93 in Littleton
US 302 in Littleton
North end: VT 18 in Waterford, VT
Counties: Grafton
Highway system
NH 16B NH 25

New Hampshire Route 18 is a 20.13-mile-long (32.40 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.

Location Mile km Destinations Notes
Franconia 0.00 0.00 I‑93 / US 3 (Franconia Notch Parkway) Southern terminus of NH 18.
I-93 Exit 34C.
2.8 4.5 NH 141 (Butterhill Road) – Twin Mountain Western terminus of NH 141.
4.0 6.4 NH 142 (Forest Hill Road) – Bethlehem Southern terminus of NH 142. To I‑93 south.
4.8 7.7 NH 116 south (Easton Road) – Easton, Littleton, Plymouth Southern terminus of NH 18/116 concurrency.
Wallace Hill Road to I‑93 (Exit 38).
5.3 8.5 NH 117 (Sugar Hill Road) – Sugar Hill Eastern terminus of NH 117.
Bethlehem 7.6 12.2 I‑93 north (Styles Bridges Highway) – Littleton I-93 Exit 39. Partial interchange; exit from I-93 south only.
9.5 15.3 I‑93 (Styles Bridges Highway) / US 302 east (Main Street) – Bethlehem, Littleton, St. Johnsbury, VT, Franconia, Plymouth Southern terminus of US 302/NH 18/116 concurrency.
I-93 Exit 40.
Littleton 11.8 19.0 NH 116 north (Union Street) – Whitefield, Berlin Northern terminus of US 302/NH 18/116 concurrency.
12.3 19.8 US 302 west (Meadow Street) – Lisbon, Woodsville
Also signed as NH 10 south.
Northern terminus of US 302/NH 18 concurrency.
To I‑93.
14.0 22.5 NH 135 north (North Littleton Road) – Dalton Southern terminus of NH-18/135 concurrency.
To I‑93.
18.7 30.1 I‑93 (Styles Bridges Highway) – Littleton, Plymouth, St. Johnsbury, VT I-93 Exit 44.
19.8 31.9 NH 135 south (Monroe Road) – Woodsville, Monroe Northern terminus of NH 18/135 concurrency.
20.13 32.40 VT 18 – Waterford Vermont-New Hampshire state line.
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


External links[edit]