The California Department of Transportation (Caltrans) is an executive department of the U.S. state of California. The department is part of the cabinet-level California State Transportation Agency (CalSTA). Caltrans is headquartered in Sacramento.
Interstate 515 (I-515) was a 20.54-mile-long (33.06 km) spur route of I-15 in the US state of Nevada that ran from the junction of I-15, US 93 and US 95 in Downtown approximately 20 miles (32 km) southeast to just north of Railroad Pass in southeastern Henderson. The freeway connected traffic headed from Boulder City and Henderson to Downtown Las Vegas via a direct, high-speed route, and it ran concurrently with, US 93, and US 95 along its entire length.
The Pennsylvania Department of Transportation (PennDOT) oversees transportation issues in the Commonwealth of Pennsylvania. The administrator of PennDOT is the Pennsylvania Secretary of Transportation, Michael B. Carroll. PennDOT supports nearly 40,000 miles (64,000 km) of state roads and highways, about 25,000 bridges, and new roadway construction with the exception of the Pennsylvania Turnpike Commission.
Interstate 11 (I-11) is an Interstate Highway that currently runs for 53.9 miles (86.7 km) on a predominantly northwest–southeast alignment in the U.S. state of Nevada, running concurrently with either or both U.S. Route 93 (US 93) and U.S. Route 95 from the Arizona state line and Boulder City. The freeway is tentatively planned to run from Nogales, Arizona, to the vicinity of Reno, Nevada, generally following the current routes of I-19, I-10, US 93, and US 95. Planners anticipate upgrading two existing highway segments to carry future I-11: US 93 in Arizona from Wickenburg to the Nevada state line on the Mike O'Callaghan–Pat Tillman Memorial Bridge over the Colorado River and US 95 in Nevada from the Las Vegas Valley to Tonopah. The most recent extension came in 2024, when officials replaced I-515 signs in Las Vegas with I-11 signs and added I-11 signs on US 95 north of Downtown Las Vegas, which extended I-11 northward about 30.5 miles (49.1 km). An extension of the Interstate northward along US 95 to Mercury, Nevada, is planned after that. An exact alignment for I-11 has yet to be determined outside of these sections; a number of corridor alternatives, however, have been identified for further study and refinement. The building of I-11 in Arizona is also facing local opposition from conservation groups.
The Tennessee Department of Transportation (TDOT) is the department of transportation for the State of Tennessee, with multimodal responsibilities in roadways, aviation, public transit, waterways, and railroads. It was established in 1915 as the Tennessee Department of Highways and Public Works, and renamed the Tennessee Department of Transportation in 1972. The core agency mission of TDOT is to provide a safe and reliable transportation system for people, goods, and services that supports economic prosperity in Tennessee. Since 1998, TDOT has been ranked amongst the top five in the nation for quality highway infrastructure. It is primarily headquartered in downtown Nashville and operates four regional offices in Chattanooga, Jackson, Knoxville, and Nashville.
Interstate 580 (I-580) is a 35.019-mile (56.358 km) auxiliary Interstate Highway in Western Nevada. It runs concurrently with US Route 395 (US 395) from an intersection with US 50 near the southern boundary of Carson City to the Reno Spaghetti Bowl interchange with I-80 in Reno. The freeway provides a high-speed direct route between Lake Tahoe and Carson City to Reno and I-80.
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 Oklahoma Department of Transportation (ODOT) is an agency of the government of Oklahoma responsible for the construction and maintenance of the state's transportation infrastructure. Under the leadership of the Oklahoma secretary of transportation and ODOT executive director, the department maintains public infrastructure that includes highways and state-owned railroads and administers programs for county roads, city streets, public transit, passenger rail, waterways and active transportation. Along with the Oklahoma Turnpike Authority, the department is the primary infrastructure construction and maintenance agency of the State.
The Texas Department of Transportation is a Texas state government agency responsible for construction and maintenance of the state's immense state highway system and the support of the state's maritime, aviation, rail, and public transportation systems. TxDOT previously administered vehicle registration prior to the creation of the Texas Department of Motor Vehicles in November 2009.
The Department of Public Works and Highways, abbreviated as DPWH, is the executive department of the Philippine government solely vested with the Mandate to “be the State's engineering and construction arm” and, as such, it is “tasked to carry out the policy” of the State to “maintain an engineering and construction arm and continuously develop its technology, for the purposes of ensuring the safety of all infrastructure facilities and securing for all public works and highways the highest efficiency and the most appropriate quality in construction” and shall be responsible for “(t)he planning, design, construction and maintenance of infrastructure facilities, especially national highways, flood control and water resources development systems, and other public works in accordance with national development objectives,” provided that, the exercise of which “shall be decentralized to the fullest extent feasible.”
The Delaware Department of Transportation (DelDOT) is an agency of the U.S. state of Delaware. The Secretary of Transportation is Nicole Majeski. The agency was established in 1917 and has its headquarters in Dover.
The Maryland State Highway Administration is the state mode responsible for maintaining Maryland's numbered highways outside Baltimore. Formed originally under authority of the General Assembly of Maryland in 1908 as the State Roads Commission (SRC), under the direction of the executive branch of state government headed by the governor of Maryland, it is tasked with maintaining non-tolled/free bridges throughout the state, removing snow from the state's major thoroughfares, administering the state's "adopt-a-highway" program, and both developing and maintaining the state's freeway/expressway system. There was a reorganization of the several commissions, bureaus, boards, and assorted minor agencies with departments of the executive branch and establishment of the governor's cabinet in the early 1970s following the adoption of several individual reorganization recommendations after the rejection by the voters in a November 1968 referendum of the 1968 proposed overall new state constitution prepared by the 1967–1968 Constitutional Convention. SHA is now a division of the larger establishment of the Maryland Department of Transportation and is currently overseen by an administrator.
The Iowa Department of Transportation is the government organization in the U.S. state of Iowa responsible for the organization, construction, and maintenance of the primary highway system. Located in Ames, Iowa, DOT is also responsible for licensing drivers and programming and planning for aviation, rail, and public transit.
The Arkansas Department of Transportation (ArDOT), formerly the Arkansas Highway and Transportation Department, is a government department in the U.S. state of Arkansas. Its mission is to provide a safe, efficient, aesthetically pleasing and environmentally sound intermodal transportation system for the user. The department is responsible for implementing policy made by the Arkansas State Highway Commission, a board of officials appointed by the Governor of Arkansas to direct transportation policy in the state. The department's director is appointed by the commission to hire staff and manage construction and maintenance on Arkansas's highways.
State Route 439 (SR 439) is a four-lane state highway in Lyon, Storey and Washoe Counties in Nevada. Better known as USA Parkway, the route connects U.S. Route 50 (US 50) in Silver Springs to Interstate 80 (I-80) in Clark via the Tahoe Reno Industrial Center (TRIC). The northern portion of USA Parkway was initially constructed by the industrial center's developers; however, the Nevada Department of Transportation (NDOT) agreed to assume control of the road after Tesla announced plans to build its Gigafactory at TRIC in 2014. NDOT opened the extension of SR 439 south to US 50 in Lyon County on September 8, 2017.
The South Carolina Department of Transportation (SCDOT) is a government agency in the US state of South Carolina. Its mission is to build and maintain roads and bridges and administer mass transit services.
Interstate 80 Business is an unofficial business loop of Interstate 80 (I-80) that is 2.26 miles (3.64 km) long and serves as the main street for the US cities of West Wendover, Nevada, and Wendover, Utah, along a roadway named Wendover Boulevard. Wendover Boulevard was originally part of US Route 40 (US 40), which connected California to New Jersey via Nevada and Utah. A portion of the Nevada segment runs concurrently with US 93 Alternate, and the entire portion in Utah is coterminous with State Route 58 (SR-58). The Nevada Department of Transportation (NDOT) applied for the business loop designation in the early 1980s, but the designation has never been approved; nevertheless, signs are posted in both states. Between July 1976 and 1993, I-80 Bus was concurrent with State Route 224 (SR 224) in Nevada.
Interstate 15 (I-15) is an Interstate Highway in the U.S. state of Nevada that begins in Primm, continues through Las Vegas and it crosses the border with Arizona in Mesquite. Within the state, the freeway runs entirely in Clark County. The highway was built along the corridor of the older U.S. Route 91 (US 91) and Arrowhead Trail, eventually replacing both of these roads.
The Wyoming Department of Transportation (WYDOT) is a government agency charged with overseeing transportation infrastructure for the U.S. state of Wyoming. WYDOT's stated mission is "to provide a safe, high quality, and efficient transportation system."
