The United States Numbered Highway System is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States. As the designation and numbering of these highways were coordinated among the states, they are sometimes called Federal Highways, but the roadways were built and have always been maintained by state or local governments since their initial designation in 1926.
U.S. Route 401 (US 401) is a north–south United States highway, a spur of U.S. Route 1, that travels along the Fall Line from Sumter, South Carolina to Interstate 85 near Wise, North Carolina.
U.S. Route 117 (US 117) is a north–south United States Highway located completely within the state of North Carolina. A spur route of US 17, the highway runs for 114 miles (183 km) from the Port of Wilmington, south of downtown Wilmington, to US 301 near Wilson. From its southern terminus, US 117 runs along Shipyard Boulevard and College Road, concurrent with North Carolina Highway 132 (NC 132) through Wilmington. US 117 intersects the eastern terminus of Interstate 40 (I-40) and parallels the interstate until reaching Faison, passing through Burgaw, Wallace, and Warsaw. The highway diverges from I-40 in Faison, running north-northeast through Mount Olive, Goldsboro, and Pikeville to its northern terminus. US 117 meets the southern end of I-795 in Goldsboro, and parallels that route before reaching its northern terminus at US 301 south of Wilson.
U.S. Route 321 (US 321) is a spur of U.S. Route 21. It runs for 516.9 miles (831.9 km) from Hardeeville, South Carolina to Lenoir City, Tennessee; with both serving as southern termini. It reaches its northernmost point at Elizabethton, Tennessee, just northeast of Johnson City. Because of its unusual "north–south–north" routing, U.S. Route 321 intersects both Interstate 40 and U.S. Route 70 three separate times. The highway serves different roles in each state: An alternate route to interstates in South Carolina, a major highway in North Carolina, and a scenic route in Tennessee.
A business route in the United States is a short special route that branches off a parent numbered highway at its beginning, continues through the central business district of a nearby city or town, and finally reconnects with the same parent numbered highway at the business route's end. Their designation is often intended to direct traffic to the business districts bypassed when a new highway is constructed some distance away.
Texas state highways are a network of highways owned and maintained by the U.S. state of Texas. The Texas Department of Transportation (TxDOT) is the state agency responsible for the day-to-day operations and maintenance of the system. Texas has the largest state highway system, followed closely by North Carolina's state highway system. In addition to the nationally numbered Interstate Highways and U.S. Highways, the highway system consists of a main network of state highways, loops, spurs, and beltways that provide local access to the other highways. The system also includes a large network of farm to market roads that connect rural areas of the state with urban areas and the rest of the state highway system. The state also owns and maintains some park and recreational roads located near and within state and national parks, as well as recreational areas. All state highways, regardless of classification, are paved roads. The Old San Antonio Road, also known as the El Camino Real, is the oldest highway in the United States, first being blazed in 1691. The length of the highways varies from US 83's 893.4 miles (1,437.8 km) inside the state borders to Spur 200 at just 0.05 miles long.
South Carolina Highway 9 (SC 9) is a 259.570-mile (418 km) major state highway in the U.S. state of South Carolina. The highway travels from Cherry Grove Beach to the North Carolina state line upstate. The highway is currently the longest state highway in South Carolina. It is signed as a north–south highway, even though it travels in an east–west direction.
State Route 365 (SR 365) is a 69.5-mile-long (111.8 km) state highway that travels within portions of Gwinnett, Hall, Habersham, and Stephens counties. It begins at exit 113 on Interstate 85 (I-85), at the southeastern edge of Suwanee. This is also the southern terminus of I-985. It continues from that point concurrent with I-985 for the entire length of that freeway. Eventually, U.S. Route 23 (US 23) also joins the concurrency. The highway heads northeast through Gainesville and Toccoa, before it terminates at the South Carolina state line, southwest of Westminster, South Carolina.
The North Carolina Highway System consists of a vast network of Interstate, United States, and state highways, managed by the North Carolina Department of Transportation. North Carolina has the second largest state maintained highway network in the United States because all roads in North Carolina are maintained by either municipalities or the state. Since counties do not maintain roads, there is no such thing as a "county road" within the state.
U.S. Highway 17 (US 17) is a 124.20-mile-long (199.88 km) United States Numbered Highway in the U.S. state of Georgia. It travels south–north near the Atlantic Ocean, serving the Brunswick and Savannah metropolitan areas on its path from Florida at the St. Marys River to South Carolina at the Savannah River. Except for part of the highway in Savannah, which is concurrent with Interstate 16 and SR 404 Spur to the Talmadge Memorial Bridge to Hutchinson Island, US 17 is concurrent with SR 25. SR 25 uses an older western alignment of US 17 into South Carolina.
South Carolina Highway 34 (SC 34) is a 185.930-mile (299.225 km) primary state highway in the U.S. state of South Carolina. As one of the longer state highways, it traverses the state east–west from Greenwood to Dillon, connecting the cities of Newberry, Winnsboro, Camden, Bishopville and Darlington.
In road transportation in the United States, a special route is a road in a numbered highway system that diverts a specific segment of related traffic away from another road. They are featured in many highway systems; most are found in the Interstate Highway System, U.S. highway system, and several state highway systems. Each type of special route possesses generally defined characteristics and has a defined relationship with its parent route. Typically, special routes share a route number with a dominant route, often referred as the "parent" or "mainline", and are given either a descriptor which may be used either before or after the route name, such as Alternate or Business, or a letter suffix that is attached to the route number. For example, an alternate route of U.S. Route 1 may be called "Alternate U.S. Route 1", "U.S. Route 1 Alternate", or "U.S. Route 1A". Occasionally, a special route will have both a descriptor and a suffix, such as U.S. Route 1A Business.
A total of at least 39 special routes of U.S. Route 17 (US 17) exist: 3 in Florida, 13 in South Carolina, 17 in North Carolina, and 6 in Virginia.
Several special routes of U.S. Route 23 (US 23) exist. There are 18 extant special routes along US 23 and 14 former routes.
Several special routes of U.S. Route 52 exist, from North Dakota to South Carolina. In order from northwest to southeast, they are as follows.
South Carolina Highway 28 (SC 28) is a 131.220-mile (211.178 km) primary state highway in the U.S. state of South Carolina. It consists of two segments of highway signed as east–west but physically traveling north–south from the Georgia state line near Mountain Rest to Beech Island. It is part of a continuous highway separated by a 17.5-mile (28.2 km) stretch through Augusta, Georgia.
South Carolina Highway 72 (SC 72) is a 124.860-mile (200.943 km) state highway, traversing interior portions of the South Carolina Piedmont region. This route is part of a multi two-state route 72 that begins at Athens, Georgia and ends at Rock Hill, South Carolina. The route connects many smaller communities outside major metropolitan areas and is roughly parallel with Interstate 85 (I-85) to the north and I-20 and I-77 to the south and east. The route shares the longest concurrency in the state with SC 121, from Whitmire to Rock Hill.
Several special routes of U.S. Route 29 (US 29) exist. In order from south to north, they are as follows.
