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.
Interstate 57 (I-57) is an Interstate Highway in Missouri and Illinois that parallels the old Illinois Central rail line for much of its route. It goes from Sikeston, Missouri, at Interstate 55 to Chicago, Illinois, at Interstate 94. I-57 essentially serves as a shortcut route for travelers headed between the south and Chicago, bypassing St. Louis, Missouri. Between the junction of I-55 and I-57 in Sikeston, Missouri and the junction of I-55 and I-90/94 in Chicago, I-55 travels for 436 miles (702 km), while the combination of I-57 and I-94 is only 396 miles (637 km) long between the same two points. In fact, both the control cities on the overhead signs, as well as destination mileage signs, reference Memphis along southbound I-57, even as far north as its northern origin at I-94 in Chicago. Likewise, at its southern end, Chicago is the control city listed for I-57 on signs on northbound I-55 south of Sikeston, Missouri, even though I-55 also goes to Chicago.
Interstate 49 (I-49) is a north–south Interstate Highway that exists in multiple segments: the original portion entirely within the state of Louisiana with an additional signed portion extending from Interstate 220 (I-220) in Shreveport to the Arkansas state line, four newer sections in Arkansas, and a new section that opened in Missouri. Its southern terminus is in Lafayette, Louisiana, at Interstate 10 while its northern terminus is in Kansas City, Missouri at Interstate 435 and Interstate 470. Portions of the remaining roadway in Louisiana, Arkansas, Missouri, and Texas, which will link Kansas City with New Orleans, are in various stages of planning or construction. When Interstate 49 is complete, the goal of the Association will have been accomplished, with only a brief gap and name change in Kansas City.
Interstate 22 (I-22) is a 202.5-mile-long (325.9 km) Interstate Highway in the U.S. states of Mississippi and Alabama, connecting I-269 near Byhalia, Mississippi to I-65 near Birmingham, Alabama. I-22 is also Corridor X of the Appalachian Development Highway System. Designated in 2012, I-22 follows the route of the older U.S. Route 78. The freeway mainly spans rural areas and passes numerous small towns along its route, including Jasper, Winfield, and Hamilton, Alabama; and Fulton, Tupelo, New Albany, and Holly Springs, Mississippi.
North Carolina Highway 295 (NC 295), also known as the Fayetteville Outer Loop, is a partially completed Interstate-grade planned 34-mile (55 km) bypass around the western side of Fayetteville, North Carolina. Although approved to become Interstate 295 (I-295) in May 2019, signs have not been updated as of July 2019.
The U.S. Route shield is the highway marker used for United States Numbered Highways. Since the first U.S. Route signs were installed in 1926, the general idea has remained the same, but many changes have been made in the details. Originally, the shield included the name of the state in which the sign was erected and the letters "U S" on a shield-shaped sign. Over time, the shield has been simplified to consist of a white shield outline on a black square background, containing only a black route number. However, because each state is responsible for the production and maintenance of U.S. Route shields, several variants of the shield have existed over the years.
A business route in the United States is a short special route connected to a parent numbered highway at its beginning, then routed through the central business district of a nearby city or town, and finally reconnecting with the same parent numbered highway again at its end.
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.
The Massachusetts State Highway System in the U.S. state of Massachusetts is a system of state-numbered routes assigned and marked by the highway division of the Massachusetts Department of Transportation (MassDOT). U.S. Highways and Interstate Highways are included in the system; the only overlaps are with the end-to-end U.S. Route 3 and Route 3 and the far-apart Interstate 295, shared with Rhode Island, and Route 295, shared with New York State. A state highway in Massachusetts is a road maintained by the state, which may or may not have a number. Not all numbered routes are maintained or owned by the state.
The New Hampshire Highway System is the public roads system of the U.S. state of New Hampshire containing approximately 17,029 miles (27,406 km) maintained by the New Hampshire Department of Transportation (NHDOT). All public roads in the state are called "highways", thus there is no technical distinction between a "road" or a "highway" in New Hampshire.
The Julian M. Carroll Purchase Parkway is a controlled-access highway in the US state of Kentucky running from Fulton to Mayfield, near Kentucky Dam, for a length of 21 miles (34 km). It begins at the Tennessee state line concurrent with U.S. Route 51 only a few yards from an intersection with US 45W, US 45E, and US 45 at its southern terminus, and at I-69 just north of US 45 at its northern terminus. It is one of seven highways that are part of the Kentucky Parkway System.
In the state of Maine, the Maine Department of Transportation (MaineDOT) has a system of numbered highways, defined as the "connected main highways throughout the state which primarily serve arterial or through traffic." As of 2006, 22,236 miles of roadway are included in the highway system, including Interstate highways, U.S. Routes, state highways, and other urban and rural local roads.
The Loop is a 21.4-mile-long (34.4 km) beltway around Texarkana, TX and Texarkana, AR, which are twin cities in the U.S. states of Arkansas and Texas. Consisting of a section of Interstate 49 (I-49) in Arkansas, and Loop 151 and a section of I-369 and U.S. Route 59 (US 59) in Texas, it forms a three-quarter loop around the east, south and west sides of the city. The Loop is built to Interstate Highway standards.
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.
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.
An unsigned highway is a highway that has been assigned a route number, but does not bear road markings that would conventionally be used to identify the route with that number. Highways are left unsigned for a variety of reasons, and examples are found throughout the world. Depending on the policy of the agency that maintains the highway, and the reason for not signing the route, the route may instead be signed a different designation from its actual number, with small inventory markers for internal use, or with nothing at all.
The Arkansas Highway System is made up of all the highways designated as Interstates, U.S. Highways and State Highways in the US state of Arkansas. The system is maintained by the Arkansas Department of Transportation (ArDOT), known as the Arkansas State Highway Department (AHD) until 1977 and the Arkansas State Highway and Transportation Department (AHTD) from 1977 to 2017. The system contains 16,442.90 miles (26,462.28 km) of Interstates, U.S. Routes, state highways, and special routes. The shortest members are unsigned state highways Arkansas Highway 806 and Arkansas Highway 885, both 0.09 miles (0.14 km) in length. The longest route is U.S. Route 67, which runs 296.95 miles (477.89 km) from Texarkana to Missouri.
Interstate 87 (I-87) is a partially completed Interstate Highway in the U.S. state of North Carolina, currently the shortest designated primary interstate highway at 12.9 miles (20.8 km). The completed portion is in eastern Wake County, between Raleigh and Wendell; the majority of the completed route is known as the Knightdale Bypass, while the remaining 3 miles (4.8 km) follows the Raleigh Beltline. It is planned to continue northeast through Rocky Mount, Williamston and Elizabeth City, ending in Norfolk, Virginia. It is not contiguous with Interstate 87 in New York. It is signed as north-south, in keeping with the sign convention for most odd-numbered interstates, but the route goes primarily east-west, with the eastern direction aligning to the north designation.
