Vermont Route 18
Map of Caledonia County in eastern Vermont with VT 18 highlighted in red
|Maintained by VTrans|
|Length||7.887 mi (12.693 km)|
|South end||NH 18 at Littleton, NH|
|I-93 in St. Johnsbury|
|North end||US 2 in St. Johnsbury|
|State highways in Vermont
Vermont Route 18 is a state highway in Caledonia County, Vermont, United States. It runs southeast from the town of St. Johnsbury to the New Hampshire state line, continuing there as New Hampshire Route 18. The route parallels Interstate 93 and is a former routing of the Theodore Roosevelt International Highway.
Vermont Route 18 begins at the New Hampshire state line between Littleton and Waterford. After crossing the Connecticut River into Vermont, VT 18 veers westward to cross under I-93 into Lower Waterford village. VT 18 then continues northwest running closely parallel to I-93 on its west side for roughly 7 miles (11 km) until Stiles Pond. Just north of the pond, I-93 changes direction from northwest to southwest. VT 18 crosses under I-93 at this point with an interchange at Exit 1 (the only numbered exit on I-93 in Vermont). Soon after the I-93 junction, VT 18 ends at U.S. Route 2 about 0.25 miles (0.40 km) past the St. Johnsbury town line. US 2 continues into the town center. VT 18 is part of the Connecticut River Byway.
Vermont Route 18 was originally part of the Theodore Roosevelt International Highway, a transcontinental auto trail organized in 1919 running from Portland, Oregon to Portland, Maine via Ontario. Several years later, in 1922, the New England states adopted the New England road marking system, assigning route numbers to the main through routes in the region. The Roosevelt Highway routing in Vermont was assigned Route 14 from Burlington to Montpelier, and Route 18 from Montpelier to the New Hampshire state line in Waterford. The original Vermont portion of Route 18 ran 40 miles (64 km) from Montpelier to St. Johnsbury using modern U.S. Route 2, then modern Vermont Route 18 from St. Johnsbury to the New Hampshire line.
In late 1926, the U.S. Highway system was established. U.S. Route 2 in Vermont was designated on New England Route 14 (Burlington to Montpelier), New England Route 25 (Montpelier to Wells River) and New England Route 15 (St. Johnsbury to Lunenburg), connected by a brief overlap with U.S. Route 5. In 1935, the portion of U.S. Route 2 between Montpelier and St. Johnsbury was relocated to use the alignment of Vermont Route 18. The previous alignment from Montpelier to Wells River was designated as part of newly established U.S. Route 302, and the overlap with U.S. Route 5 was eliminated. This truncated the northern/western end of Vermont Route 18 to St. Johnsbury.
|Waterford||0.000||0.000||NH 18||Continuation into New Hampshire|
|I-93 – Littleton NH, St. Johnsbury||Exit 1 (I-93)|
|St. Johnsbury||7.887||12.693||US 2 – St. Johnsbury, Concord|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- Motor Sign Uniformity, New York Times, April 16, 1922
- Traffic Research Unit (May 2013). "2012 (Route Log) AADTs for State Highways" (PDF). Policy, Planning and Intermodal Development Division, Vermont Agency of Transportation. Retrieved March 11, 2015.
- Google (June 8, 2009). "overview map of VT 18" (Map). Google Maps. Google. Retrieved June 8, 2009.
- Max J. Skidmore, Moose Crossing: Portland to Portland on the Theodore Roosevelt International Highway, Hamilton Books, 2006, ISBN 0-7618-3510-5
- Official Automobile Blue Book, Vol. 1, 1926 edition, (Automobile Blue Books Inc., Chicago, 1926). Map indicated the routing of the Theodore Roosevelt International Highway by "T" markers along the route.
- Automobile Legal Association Green Book, 1925 edition, (Scarborough Motor Guide Co., Boston, 1925). A route log of the New England Inter-state routes is included in the book showing rough mileage.
- United States Numbered Highways, American Highways (AASHO), April 1927
- Official Automobile Blue Book, Vol. 1, 1927 edition, (Automobile Blue Books Inc., Chicago, 1927)
- Automobile Legal Association Green Book, 1938/39 edition, (Scarborough Motor Guide Co., Boston, 1938)