The Interstate Highways in Texas are all owned and maintained by the U.S. state of Texas. The Texas Department of Transportation (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, is a network of controlled-access highways that forms part of the National Highway System in the United States. Th ...

in Texas. The Interstate Highway System in Texas covers and consists of twelve primary routes, seven auxiliary routes and Interstate 35 (I-35) which is split into two branches, I-35E and I-35W, that provide access to both

Fort Worth Fort Worth is the fifth-largest city in the U.S. state of Texas and the 13th-largest city in the United States. It is the county seat of Tarrant County, covering nearly into four other counties: Denton, Johnson, Parker, and Wise. According ...

and Dallas. The longest segment of Interstate Highway in Texas is

I-10 Interstate 10 (I-10) is the southernmost cross-country highway in the American Interstate Highway System. I-10 is the fourth-longest Interstate in the United States at , following I-90, I-80, and I-40. This freeway is part of the originally pl ...

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 between Galveston and Houston 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, 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 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 southward from its original terminus in Indiana through Texas to the United States–Mexico border. If complete as planned, I-69 will extend about across Texas, from the Louisiana state line in the Texarkana–

Shreveport Shreveport ( ) is a city in the U.S. state of Louisiana. It is the third most populous city in Louisiana after New Orleans and Baton Rouge, Louisiana, Baton Rouge, respectively. The Shreveport–Bossier City metropolitan area, with a population o ...

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 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

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 at I-635 and US 75 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