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.
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.
Route 495 is a 3.45-mile-long (5.55 km) state highway in Hudson County, New Jersey, in the United States that connects the New Jersey Turnpike at exits 16E-17 in Secaucus to New York State Route 495 (NY 495) inside the Lincoln Tunnel in Weehawken, providing access to Midtown Manhattan in New York City. The road is owned and operated by the New Jersey Turnpike Authority (NJTA) between the New Jersey Turnpike and Route 3, the New Jersey Department of Transportation (NJDOT) between Route 3 and Park Avenue near the Union City–Weehawken border, and by the Port Authority of New York and New Jersey (PANYNJ) east of Park Avenue, including the helix viaduct used to descend the New Jersey Palisades to reach the entrance of the Lincoln Tunnel. Route 495 is mostly a six-lane freeway with a reversible bus lane used during the morning rush hour. The bus lane, which runs the entire length of the freeway, continues into the Lincoln Tunnel's center tube.
The Kansas Turnpike is a 236-mile (380 km) controlled-access toll road that lies entirely within the US state of Kansas. It runs in a general southwest–northeast direction from the Oklahoma border to Kansas City. It passes through several major Kansas cities, including Wichita, Topeka, and Lawrence. The turnpike is owned and maintained by the Kansas Turnpike Authority (KTA), which is headquartered in Wichita.
The Falmouth Spur is a short freeway connecting Interstate 95 (I-95) with I-295 and US Route 1 (US 1) north of Portland, Maine, in the United States. It carries the unsigned designation of Interstate 495 (I-495). As part of the Maine Turnpike, the mainline of which carries I-95, the Falmouth Spur is a toll road. The spur has only two interchanges—one at each end—and a toll booth in the middle. It is signed only for its destinations—I-95, I-295, and US 1—to minimize driver confusion.
The John Kilpatrick Turnpike pending Interstate 344 (I-344) signage as of June of 2024, is a controlled-access toll road in Oklahoma City, Oklahoma. The turnpike forms a partial beltway that runs from State Highway 152 (SH-152) and Interstate 240 (I-240) to an interchange with Interstate 35 (I-35) and Interstate 44 (I-44). At the eastern terminus, traffic continuing east merges with I-44 traffic, forming the Turner Turnpike. The Kilpatrick Turnpike is 31.0 miles (49.9 km) long.
The Cimarron Turnpike is a controlled-access toll road in north-central Oklahoma. The route travels 67 miles (108 km), from an interchange with Interstate 35 (I-35) north of Perry, to Westport, just west of Tulsa. The route also consists of a 7.2-mile (11.6 km) spur which runs from the mainline southwest to an interchange with U.S. Route 177 north of Stillwater.
Interstate 240 (I-240) is an Interstate Highway in southern Oklahoma City, Oklahoma, United States, that runs 26.8 miles (43.1 km) from I-40 to I-344 /SH-152. The Interstate overlaps State Highway 3 (SH-3) the longest Oklahoma state highway, for most of its length and functions as a southern bypass around the Downtown area.
State Highway 152 is a state highway running through west-central Oklahoma. It begins at the Texas state line, serving as a continuation of Texas State Highway 152, and continues east to end at Interstate 344/Interstate 240(I-344/I-240) in southwest Oklahoma City, a length of 145 miles (233 km). Along its route it serves three county seats: Sayre, Cordell, and Oklahoma City. Near the east end, it passes through in the Oklahoma City suburb of Mustang before being its terminus on the east side of that town.
Interstate 81 (I-81) is part of the Interstate Highway System that runs 855.02 miles (1,376.02 km) northward from Dandridge, Tennessee, to the Thousand Islands Bridge at the Canadian border near Fishers Landing, New York. In Tennessee, I-81 serves the northeastern part of the state, running 75.66 miles (121.76 km) from its southern terminus with I-40 in Dandridge to the Virginia state line in Bristol. The route serves the Tri-Cities region of the state and the eastern parts of the Knoxville metropolitan area, terminating about 35 miles (56 km) east of Knoxville. I-81 bypasses most cities that it serves, instead providing access via interchanges with state and federal routes. It remains in the Ridge-and-Valley topographic region of the Appalachian Mountains for its entire length in Tennessee, and runs in a northeast to southwest direction.
Interstate 77 (I-77) in Ohio is an Interstate Highway that runs for 163.03 miles (262.37 km) through the state. The highway crosses into Ohio on the Marietta–Williamstown Interstate Bridge over the Ohio River near Marietta. The northern terminus is in Cleveland at the junction with I-90. From the West Virginia state line to Cleveland, I-77 serves the cities of Marietta, Cambridge, New Philadelphia, Canton, Akron, and the Cleveland suburban city of Brecksville.
The Delaware State Route System consists of roads in the U.S. state of Delaware that are maintained by the Delaware Department of Transportation (DelDOT). The system includes the portions of the Interstate Highway System and United States Numbered Highways system located in the state along with state routes and other roads maintained by DelDOT. All roads maintained by the state are assigned a maintenance road number that is only marked on little white markers at intersections and on auxiliary plates below warning signs approaching intersections. These numbers are only unique in a specific county; some roads can be designated with multiple road numbers, and numbers do not necessarily correspond to the signed Interstate, U.S., or state route numbers. DelDOT maintains a total of 5,386.14 miles (8,668.15 km) of roads, comprising 89 percent of the roads within the state. Some large bridges in the state are maintained by other agencies including the U.S. Army Corps of Engineers and the Delaware River and Bay Authority. Roads in the system include multilane freeways, multilane surface divided highways, and two-lane undivided roads serving urban, suburban, and rural areas. Some of the roads maintained by DelDOT are toll roads, in which motorists must pay to use.
The Kickapoo Turnpike is a 19.6-mile (31.5 km) controlled-access toll road in the U.S. state of Oklahoma. The northern section from US 62 to I-44 opened to traffic on October 13, 2020. The southern segment from I-40 to US 62 opened to traffic on January 5, 2021. It's pending Interstate 335 (I-335) signage as of June 2024, although a connection with I-35 will not be made until the southern extension of the turnpike to Purcell is built.
I-35 
I-40 
I-42 
I-44 
I-235 
I-240 
I-244 
I-335 
I-344 
I-440 
I-444 