Interstate 10 (I-10) is the southernmost transcontinental highway in the Interstate Highway System. I-10 is the fourth-longest Interstate in the United States at 2,460.34 miles (3,959.53 km), following I-90, I-80, and I-40. This freeway is part of the originally planned network that was laid out in 1956, and its last section was completed in 1990.
Interstate 45 (I-45) is a major Interstate Highway located entirely within the U.S. state of Texas. While most Interstate routes which have numbers ending in "5" are cross-country north–south routes, I-45 is comparatively short, with the entire route located in Texas. Additionally, it has the shortest length of all the interstates that end in a "5". It connects the cities of Dallas and Houston, continuing southeast from Houston to Galveston over the Galveston Causeway to the Gulf of Mexico.
U.S. Route 75 is a north–south U.S. Highway that runs 1,239 miles (1,994 km) 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 once continued farther north as Manitoba Highway 75. Its southern terminus is located at Interstate 30 (I-30) and I-45 in Dallas, Texas, where US 75 is known as North Central Expressway.
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.
State Highway 121 is a state highway angling from southwest to northeast through north central Texas. It runs from Cleburne, Texas at US 67 to SH 78 in Bonham, Texas, just north of a junction with US 82.
Interstate 610 (I-610) is an auxiliary Interstate Highway that forms a 37.972-mile-long (61.110 km) loop around the inner city sector of the city of Houston, Texas. I-610, colloquially known as The Loop, Loop 610, The Inner Loop, or just 610, traditionally marks the border between the inner city of Houston and its surrounding areas. It is the innermost of the three Houston beltways, the other two being Beltway 8 and State Highway 99, of which various segments are under construction or planning. In Houston, the area inside I-610 is the urban core. Jeff Balke of the Houston Press wrote that the freeway "is as much a social and philosophical divide as a physical one". Mike Snyder in the Houston Chronicle wrote that, as someone from inside I-610, he historically felt "kind of special" due to being close to "the city's historical core and its major business, educational and cultural institutions".
State Highway 35 is a state highway in the U.S. state of Texas, maintained by the Texas Department of Transportation (TxDOT). It runs primarily south–north, paralleling the Gulf of Mexico for much of its length, from a junction with Interstate 37 in Corpus Christi to Interstate 45 in southeastern Houston.
State Highway 99, also known as the Grand Parkway, is a beltway in the U.S. state of Texas. Its first section opened on August 31, 1994. When the route is completed, it will be the longest beltway in the U.S., the world's seventh-longest ring road, and the third (outer) loop of the Houston–The Woodlands–Sugar Land metropolitan area, with Interstate 610 being the first (inner) loop and Beltway 8 being the second (middle) loop. The proposed 170-mile (270 km) loop has been divided into 11 separate segments for construction and funding purposes. In May 2019, the Texas Department of Transportation gave the Grand Parkway a secondary designation as the Mayor Bob Lanier Memorial Parkway, honoring Bob Lanier, who served as the mayor of Houston from 1992 to 1998 and who had spearheaded the creation of the Grand Parkway.
Beltway 8 (BW8), the Sam Houston Parkway, along with the Sam Houston Tollway, is an 88-mile (142 km) beltway around the city of Houston, Texas, United States, lying entirely within Harris County.
State Highway 3 is a state highway in the U.S. state of Texas that runs from Interstate 45 in Houston near William P. Hobby Airport to State Highway 146, 9.9 miles (15.9 km) northwest of Galveston. For most of its length, SH 3 parallels I-45 and runs alongside the former Galveston, Houston and Henderson Railroad lines.
Loop 12 is a state highway that runs mostly within the city limits of Dallas, Texas. The western segment of the loop is named after General Walton Walker, who served and died in South Korea. During the 1950s and 1960s, Loop 12 was the outer beltway in the Dallas area, having since been supplanted by Interstate 635 (I-635), which is itself being supplanted by the President George Bush Turnpike. Loop 12 is, however, the only state highway in Dallas that forms a complete loop.
State Highway 288 (SH 288) is a north–south highway in the southeastern portion of the U.S. state of Texas, between I-45 in downtown Houston and Freeport, where it terminates on FM 1495. The route was originally designated by 1939, replacing the southern portion of SH 19.
A directional interchange, colloquially known as a stack interchange, is a type of grade-separated junction between two controlled-access highways that allows for free-flowing movement to and from all directions of traffic. These interchanges eliminate the problems of weaving, have the highest vehicle capacity, and vehicles travel shorter distances when compared to different types of interchanges.
The Fort Bend Parkway Toll Road is the Fort Bend County portion of a controlled-access toll road connecting Sienna in eastern Fort Bend County to US 90A in southwestern Harris County. It is administered by the Fort Bend County Toll Road Authority (FBCTRA). The Harris County Toll Road Authority (HCTRA) administers the Harris County segment of the road — from just south of Beltway 8 at the county line to US 90A — and uses its purple pentagonal shield labeled as Fort Bend Toll Road. It is proposed to reach a northern terminus at the southwestern corner of Interstate 610 in the future, and SH 99 at its southern terminus.
The Harris County Toll Road Authority maintains and operates a 103-mile (165.8 km) toll road system in the Greater Houston area of Texas, United States. Its headquarters are located in Houston's Fairbanks/Northwest Crossing neighborhood.
Interstate 10 (I-10) is the major east–west Interstate Highway in the Southern United States. In the U.S. state of Texas, it runs east from Anthony, at the border with New Mexico, through El Paso, San Antonio, and Houston to the border with Louisiana in Orange. At just under 880 mi (1,420 km), the Texas segment of I-10, maintained by the Texas Department of Transportation, is the longest continuous untolled freeway in North America that is operated by a single authority. It is also the longest stretch of Interstate Highway with a single designation within a single state. Mile marker 880 and its corresponding exit number in Orange, Texas, are the highest-numbered mile marker and exit on any freeway in North America. Since widening was completed in 2008, a portion of the highway west of Houston is now also believed to be the widest in the world, at 26 lanes when including feeders.
State Highway 225 is an east–west freeway in the Houston area between the Interstate 610 Loop in Houston and State Highway 146/future State Highway 99 in La Porte. It is identified as the Pasadena Freeway over its entire length except for La Porte where it is called the La Porte Freeway. The freeway passes near several refineries, chemical plants, and tank farms as it passes through Pasadena and Deer Park.
U.S. Route 90 is a major east–west highway in the U.S. state of Texas with large portions of it running concurrently with I-10. US 90 begins at Bus. I-10 in Van Horn, travels through San Antonio and Houston, and continues on into the state of Louisiana.
A total of ten special routes of U.S. Route 90 exist.
US 90 / FM 464 west of Seguin 
