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Over the years, the system has expanded significantly, reflecting the growth and changing needs of Texas. As of 2021, the total length of the 246 currently in-service highways with unique assigned numbers is 14,092.7 miles (22,680.0 km). [1]
In 1992, the 3,200 miles (5,100 km) of Interstate Highway System in Texas was completed with the opening of a six-mile (9.7 km) section of I-27. In 1997, the Texas Turnpike Authority was merged with TxDOT and independently, the North Texas Turnpike Authority became responsible for toll projects in Collin , Dallas , Denton , and Tarrant counties.
Business U.S. Highway 59-D (Bus. US 59-D), formerly Loop 455, is a 3.585-mile-long (5.769 km) business loop in Carthage. [8] This is the oldest signed business route of US 59 in Texas, having been originally designated on October 21, 1959, with the hidden designation of Loop 455, after US 59 was re-routed and bypassed Carthage. [9]
The Texas Department of Transportation (TxDOT) is the agency responsible for the day-to-day maintenance and operations of the Interstate Highways in Texas. The Interstate Highway System in Texas covers 3,239.7 miles (5,213.8 km) and consists of twelve primary routes , seven auxiliary routes and Interstate 35 (I-35) which is split into two ...
[c] 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 .
U.S. Highway 75 (US 75) is a part of the U.S. Highway System that travels from Interstate 345 (I-345) in Dallas, Texas northward to the Canadian border in Noyes, Minnesota. In the state of Texas it runs from I-345 in Dallas and heads north to the Oklahoma state line, a distance of about 75.3 miles (121.2 km).
Interstate 295 was the first highway in Rhode Island to receive mile-based exit numbers, starting in November 2017. Mile-based exit numbers have been added to Route 146 as part of a sign replacement project. Conversion completed in November 2022, with I-95 the last remaining highway in the state. Texas: Late 1970s.
At-grade intersection on I-40 near milemarker 8 in far west Texas. I-40 in Texas is one of a few Interstate Highways with at-grade intersections.The westernmost 16 miles (26 km) of I-40 in Texas, near the New Mexico state line, lacks the frontage roads typical to Texas freeways, and eight driveways for ranches directly intersect the main lanes of I-40, in violation of Interstate standards.