The Big Dig was a megaproject in Boston that rerouted the then elevated Central Artery of Interstate 93 that cut across Boston into the O'Neill Tunnel and built the Ted Williams Tunnel to extend Interstate 90 to Logan International Airport. Those two projects were the origin of the official name, the Central Artery/Tunnel Project. Additionally, the project constructed the Zakim Bunker Hill Bridge over the Charles River, created the Rose Kennedy Greenway in the space vacated by the previous I-93 elevated roadway, and funded more than a dozen projects to improve the region's public transportation system. Planning for the project began in 1982; the construction work was carried out between 1991 and 2006; and the project concluded on December 31, 2007. The project's general contractor was Bechtel and Parsons Brinckerhoff was the engineer, who worked as a consortium, both overseen by the Massachusetts Highway Department.
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.
The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, or the Eisenhower Interstate System, is a network of controlled-access highways that forms part of the National Highway System in the United States. The system extends throughout the contiguous United States and has routes in Hawaii, Alaska, and Puerto Rico.
Interstate 69 (I-69) is an Interstate Highway in the United States currently consisting of 10 unconnected segments with an original continuous segment from Indianapolis, Indiana, northeast to the Canadian border in Port Huron, Michigan, at 355.8 miles (572.6 km). The remaining separated segments are variously completed and posted or not posted sections of an extension southwest to the Mexican border in Texas. Of this extension—nicknamed the NAFTA Superhighway because it would help trade with Canada and Mexico spurred by the North American Free Trade Agreement (NAFTA)—seven pieces in Laredo, Texas; Pharr, Texas; Brownsville, Texas; Corpus Christi, Texas; Houston, Texas; northwestern Mississippi; and Memphis, Tennessee, have been built or upgraded and signposted as I-69. Indiana is currently working on a fifth segment that will extend I-69 through the entire state while a sixth segment of I-69 through Kentucky utilizing that state's existing parkway system and a section of I-24 was established by federal legislation in 2008 with several more parkway segments being upgraded since then. This brings the total length to about 880 miles (1,420 km).
The Massachusetts Turnpike is a controlled-access toll road in the US state of Massachusetts that is maintained by the Massachusetts Department of Transportation (MassDOT). The turnpike begins at the New York state line in West Stockbridge, linking with the Berkshire Connector portion of the New York State Thruway. Spanning 138 miles (222 km) along an east–west axis, the turnpike constitutes the Massachusetts section of Interstate 90 (I-90). The turnpike is the longest Interstate Highway in Massachusetts, while I-90, in full, is the longest Interstate Highway in the United States.
U.S. Route 290 is an east–west U.S. Highway located entirely within the state of Texas. Its western terminus is at Interstate 10 southeast of Segovia, and its eastern terminus is at Interstate 610 in northwest Houston. It is the main highway between Houston and Austin and is a cutoff for travelers wanting to bypass San Antonio on Interstate 10. Throughout its length west of Austin, US 290 cuts across mountainous hills comprising the Texas Hill Country and the Edwards Plateau; between Austin and Houston, the highway then travels through gradually hilly grasslands and pine forests comprising the Gulf Coastal Plains.
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 14 (I-14), also known as the 14th Amendment Highway, the Gulf Coast Strategic Highway, and the Central Texas Corridor, is an Interstate Highway that is currently located entirely in Central Texas, following US Highway 190 (US 190). The portion of the route that has been constructed and signed to date, the Central Texas Corridor along US 190 west of I-35 was officially designated as I-14 by the Fixing America's Surface Transportation Act, signed by President Barack Obama on December 14, 2015.
The Michigan Department of Transportation (MDOT) is a constitutional government principal department of the US state of Michigan. The primary purpose of MDOT is to maintain the Michigan State Trunkline Highway System which includes all Interstate, US and state highways in Michigan with the exception of the Mackinac Bridge. Other responsibilities that fall under MDOT's mandate include airports, shipping and rail in Michigan.
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 Indiana Department of Transportation (INDOT) is a governmental agency of the U.S. state of Indiana charged with maintaining and regulating transportation and transportation related infrastructure such as state owned airports, state highways and state owned canals or railroads.
Arizona Highways is a magazine that contains travelogues and artistic photographs related to the U.S. state of Arizona. It is published monthly in Phoenix by a unit of the Arizona Department of Transportation (ADOT).
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.
State Highway 130 (SH 130), also known as the Pickle Parkway, is a freeway from Interstate 35 (I-35) in San Antonio along I-410 and I-10 to east of Seguin, then north as a toll road from there to I-35 north of Georgetown. SH 130 runs in a 91-mile (146 km) corridor east and south of Austin. The route parallels I-35 and is intended to relieve the Interstate's traffic volume through the San Antonio–Austin corridor by serving as an alternate route.
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 506 (SR 506) is an 11.53-mile (18.56 km) long state highway in Cowlitz and Lewis counties, part of the U.S. state of Washington, serving the communities of Ryderwood and Vader. SR 506 begins at the intersection of 2nd and Morse Street in Ryderwood, a community in Cowlitz County, traveling north into Lewis County and turning east past Vader to parallel the Cowlitz River and interchange Interstate 5 (I-5) twice west of Toledo. Originating as Secondary State Highway 1P (SSH 1P) in 1937, the highway was designated in its current form in 1964 and it shared its eastern terminus with SR 505. SR 411 terminated at Vader and both SR 411 and SR 505 were moved away from SR 506 in 1991.
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.
There are approximately 25 current toll roads in the state of Texas. Toll roads are more common in Texas than in many other U.S. states, since the relatively low revenues from the state's gasoline tax limits highway planners' means to fund the construction and operation of highways.
The Mississippi Department of Transportation (MDOT) is the organization in charge of developing and maintaining all state and federal roadways in the U.S. state of Mississippi. In addition to highways, the department also has a limited role in supporting Mississippi's public transportation system, ports and waterways system, aeronautics and railroads. MDOT is headquartered in downtown Jackson.
Interstate business routes are roads connecting a central or commercial district of a city or town with an Interstate bypass. These roads typically follow along local streets often along a former U.S. Route or state highway that had been replaced by an Interstate. Interstate business route reassurance markers are signed as either loops or spurs using a green shield shaped and numbered like the shield of the parent Interstate highway.
