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There are 22 Interstate Highways—9 primary and 13 auxiliary—that exist entirely or partially in the U.S. state of North Carolina.As of January 2020, the state had a total of 1,410 miles (2,270 km) of Interstates and 70 miles (110 km) of Interstate business routes, all maintained by the North Carolina Department of Transportation (NCDOT).
Interstate 285 (I-285) is a 23.49 mile long auxiliary interstate highway connecting the cities of Lexington and Winston-Salem, in the U.S. state of North Carolina. The route was approved in February 2018 and was first signed in November 2018.
U.S. Highway 29 (US 29) is a United States Numbered Highway that runs for 168.7 miles (271.5 km) from the South Carolina state line, near Blacksburg, to the commonwealth of Virginia, near Danville. It is signed with north–south cardinal directions but is actually a northeast and southwest diagonal highway throughout the state.
A portion of I-87, originally designated I-495, was first designated as an Interstate Highway on February 20, 2013, when the North Carolina Department of Transportation (NCDOT) submitted a request to the American Association of State Highway and Transportation Officials (AASHTO) in order to establish I-495 as a new auxiliary route of I-95.
Typically, North Carolina highway route numbers do not share numbers with any U.S. Highway or Interstate Highway in the state. If a new highway is established that would have the same number as a state highway, the state highway number usually changes. North Carolina grants exceptions to this rule in limited cases.
U.S. Route 13 (US 13) is a United States Numbered Highway running from Eastover, North Carolina to Morrisville, Pennsylvania. In North Carolina, it runs along a northeast–southwest alignment for 189.1 miles (304.3 km) connecting the cities of Fayetteville, Goldsboro, Greenville, Williamston, and Ahoskie.
An alternative route, I-26, is also closed in Tennessee, between Exit 37 (TN 107) and Exit 43 (U.S. 19W). NCDOT says it’s likely to remain that way at least through Sunday afternoon.
The interchange features left exit and entrances; while travelers along eastbound I-26/westbound I-240, access to eastbound I-40 is via North Carolina Highway 191 (NC 191, Brevard Road, exit 1). Westbound I-40/US 74 continues on to Canton and Knoxville ; eastbound I-40 provides access to nearby Biltmore Estate and further on to Hickory .