Route 18 may refer to:
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.
West Virginia Route 18 is a north–south state highway in the northwestern portion of the U.S. state of West Virginia. The southern terminus of the route is at West Virginia Route 47 in Troy, Gilmer County. The northern terminus is at the Sistersville Ferry on Catherine St in Sistersville, Tyler County. WV 18 uses Charles St, Main St and Catherine St through Sistersville to reach the ferry. As of September 2015, WVDOH signage does not show WV 18 on WV 2.
In public transport, Route 18 may refer to:
Massachusetts Route 18 is a north–south state highway in Southeastern Massachusetts. Beginning in the city of New Bedford, it runs as a freeway for approximately 2 miles (3.2 km), continuing as a surface street until Weymouth.
Route 18 starts as a four-lane freeway, a continuation of John F. Kennedy Memorial Highway in downtown New Bedford, at U.S. Route 6. After the intersection with I-195, Route 18 runs via surface streets parallel to Route 140 for a while, up to a connector road with Route 140 northbound. (Before its highway route was constructed, Route 140 followed County Road from Taunton until terminating at Route 18 in Freetown near the New Bedford line.) Route 18 then continues on a generally northerly direction. The highway goes through the East Freetown section of Freetown, Lakeville (with a three-mile (5 km) concurrency with Route 105 along Assawompset Pond), Middleborough, where the highway meets U.S. Route 44 and Route 28 at the Middleboro rotary just north of Interstate 495, beginning a six-mile (10 km) concurrency with Route 28 until the center of Bridgewater, East Bridgewater, Whitman, Abington, and Weymouth, ending at Route 53.
Delaware Route 18 (DE 18) is a state highway located in Sussex County, Delaware. It runs from Maryland Route 318 (MD 318) at the Maryland border east of Federalsburg, Maryland to U.S. Route 9 (US 9) in Georgetown. DE 18 runs concurrent with DE 404 from its intersection with that highway southeast of Bridgeville to the eastern terminus, where DE 404 continues eastward to Five Points on US 9. The route passes through rural areas of western Sussex County. What would become DE 18 was built as a state highway in stages during the 1920s and 1930s. By 1936, DE 18 was designated to run from the Maryland border east through Georgetown to Lewes. In 1974, the route east of Georgetown was replaced by US 9 and US 9 Business (US 9 Bus.). DE 404 was designated along the eastern portion of DE 18 by 1987.
DE 18 begins at the Maryland border, where it continues west into that state as MD 318. From the state line, the route heads east on two-lane undivided Federalsburg Road, passing through agricultural areas with some woods and homes. In Clarksons Crossroads, DE 18 turns southeast onto Cannon Road while Federalsburg Road continues northeast toward Bridgeville. The road continues to the community of Cannon, where it crosses Norfolk Southern's Delmarva Secondary railroad line. East of Cannon, the route comes to an intersection with US 13. Following this intersection, DE 18 heads northeast through farm fields, reaching an intersection with DE 404.