The Interstate Highways in Texas are all owned and maintained by the U.S. state of

Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...

. The

Texas Department of Transportation The Texas Department of Transportation (TxDOT ) is a Texas state government agency responsible for construction and maintenance of the state's immense Texas state highway system, state highway system and the support of the state's maritime trans ...

(TxDOT) is the agency responsible for the day-to-day maintenance and operations of the

Interstate Highways 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 H ...

in Texas. The Interstate Highway System in Texas covers and consists of twelve primary routes, seven auxiliary routes and

Interstate 35 Interstate 35 (I-35) is a major Interstate Highway in the central United States. As with most primary Interstates that end in a five, it is a major cross-country, north–south route. It stretches from Laredo, Texas, near the Mexican bo ...

(I-35) which is split into two branches, I-35E and I-35W, that provide access to both

Fort Worth Fort Worth is a city in the U.S. state of Texas and the county seat of Tarrant County, Texas, Tarrant County, covering nearly into Denton County, Texas, Denton, Johnson County, Texas, Johnson, Parker County, Texas, Parker, and Wise County, Te ...

and

Dallas Dallas () is a city in the U.S. state of Texas and the most populous city in the Dallas–Fort Worth metroplex, the List of Texas metropolitan areas, most populous metropolitan area in Texas and the Metropolitan statistical area, fourth-most ...

. The longest segment of Interstate Highway in Texas is

I-10 Interstate 10 (I-10) is the southernmost transcontinental highway in the Interstate Highway System of the United States. It is the fourth-longest Interstate in the country at , following I-90, I-80, and I-40. It was part of the originall ...

at ; the shortest is I-110 at . The construction of the Interstate Highway System in Texas began well before these routes were designated as Interstate Highways. A stretch of

I-45 Interstate 45 (I-45) is a major Interstate Highway located entirely within the U.S. state of Texas. While most primary Interstate routes which have numbers ending in "5" are cross-country north–south routes, I-45 is comparatively short, ...

between

Galveston Galveston ( ) is a Gulf Coast of the United States, coastal resort town, resort city and port off the Southeast Texas coast on Galveston Island and Pelican Island (Texas), Pelican Island in the U.S. state of Texas. The community of , with a pop ...

and

Houston Houston ( ) is the List of cities in Texas by population, most populous city in the U.S. state of Texas and in the Southern United States. Located in Southeast Texas near Galveston Bay and the Gulf of Mexico, it is the county seat, seat of ...

was opened in 1951, eight years before it was designated I-45. It was also the first urban expressway in Texas. In 1962, of I-35 opened in

Bexar County Bexar County ( or ; ) is a county in the U.S. state of Texas. It is in South Texas and its county seat is San Antonio. As of the 2020 census, the population was 2,009,324, making it the state's fourth-most populous county. Bexar County ...

, the first section of Interstate Highway to open from county line to county line in a large metropolitan area. Portions of I-10 west of

San Antonio San Antonio ( ; Spanish for " Saint Anthony") is a city in the U.S. state of Texas and the most populous city in Greater San Antonio. San Antonio is the third-largest metropolitan area in Texas and the 24th-largest metropolitan area in the ...

took much longer to complete due to the vast open spaces and lack of nearby labor. The majority of the construction of this section of I-10 occurred in the 1970s and 1980s and was complete by the early 1990s. The section east of San Antonio was completed 20 years earlier in 1972. The opening of a section of I-27 in 1992 completed the Interstate Highway System in Texas. Planning is ongoing for a proposed extension of

I-69 Interstate 69 (I-69) is an Interstate Highway in the United States currently consisting of eight unconnected segments. The longest segment runs from Evansville, Indiana, northeast to the Canada–United States border, Canadian border in Po ...

southward from its original terminus in

Indiana Indiana ( ) is a U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders Lake Michigan to the northwest, Michigan to the north and northeast, Ohio to the east, the Ohio River and Kentucky to the s ...

through Texas to the

United States–Mexico border United may refer to: Places * United, Pennsylvania, an unincorporated community * United, West Virginia, an unincorporated community Arts and entertainment Films * ''United'' (2003 film), a Norwegian film * ''United'' (2011 film), a BBC Two f ...

. If complete as planned, I-69 will extend about across Texas, from the

Louisiana Louisiana ( ; ; ) is a state in the Deep South and South Central regions of the United States. It borders Texas to the west, Arkansas to the north, and Mississippi to the east. Of the 50 U.S. states, it ranks 31st in area and 25 ...

state line in the

Texarkana The Texarkana metropolitan statistical area (MSA), as defined by the United States Office of Management and Budget, is a two-county region anchored by the Twin cities (geographical proximity), twin cities of Texarkana, Texas (population 37,33 ...

–

Shreveport Shreveport ( ) is a city in the U.S. state of Louisiana. It is the List of municipalities in Louisiana, third-most populous city in Louisiana after New Orleans and Baton Rouge, Louisiana, Baton Rouge. The bulk of Shreveport is in Caddo Parish, Lo ...

area to South Texas. The first portion was approved in 2011, with signage posted December 6, 2011.

Primary Interstate Highways

File:Downtown San Antonio.jpg, alt=Photograph, I-10 and I-35 run concurrently as an elevated freeway in

Downtown San Antonio Downtown San Antonio is the central business district of San Antonio, Texas, and the urban core of Greater San Antonio, a metropolitan area with nearly 2.5 million people. Downtown San Antonio is encircled by Texas State Highway Loop 1604, 16 ...

File:FTWORTHTX3224.JPG, alt=Photograph, I-20 in southern Fort Worth File:I-37, I-410 interchange, San Antonio, Texas.JPG, alt=Photograph, I-37 and I-410 interchange on the southeast side of San Antonio File:I-37 - US 77 interchange.jpg, alt=Photograph, Interchange between I-37 and I-69E/US 77 File:45intoI-10 2.jpg, alt=Aerial photograph, I-10/US 90 and I-45 near

Downtown Houston Downtown is the largest central business district in the city of Houston and the largest in the state of Texas, located near the geographic center of the metropolitan area at the confluence of Interstate 10 in Texas, Interstate 10, Interstate 45 ...

Auxiliary Interstate Highways

File:Houston, TX - IH610 US290 - exit12 w18th st - Hempstead rd.jpg, alt=Photograph, I-610 at US 290 in Houston File:High Five Interchange.jpg, alt=Photograph, The

High Five Interchange The High Five Interchange is one of the first five-level stack interchanges built in Dallas, Texas. Located at the junction of the Lyndon B. Johnson Freeway ( Interstate 635, or I-635) and the Central Expressway ( U.S. Highway 75, or ...

at I-635 and

US 75 U.S. Route 75 is a north–south U.S. Highway that runs in the central United States. The highway's northern terminus is located at the Canadian border near Noyes, Minnesota, at a now-closed border crossing. From this point, the highway ...

in Dallas

Business Interstate Highways

File:Van horn texas.jpg, alt=Photograph, Bus. I-10-D in Van Horn File:Downtown Pearsall, TX IMG 0480.JPG, alt=Photograph, Bus. I-35-E in Pearsall

Notes

References

External links

Texas Department of Transportation

Texas Highway Man
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