Interstate 10 in Texas

Interstate 10 is the major east–west Interstate Highway in the Southern United States. In the U.S. state of Texas, it runs east from El Paso, near the border with New Mexico, through San Antonio and Houston to the border with Louisiana in Orange, Texas.

At just under , the length of Interstate 10 crossing Texas, maintained by the Texas Department of Transportation, is the longest continuous untolled freeway under a single authority in North America, a title formerly held by Ontario's Highway 401. Mile marker 880 (and the corresponding exit number) near Orange are the highest numbered mile marker and exit on the Interstate Highway System or, for that matter, on any freeway in North America.

Texas alone contains more than a third of the interstate's entire length. El Paso, on the Texas – New Mexico border, is from the western terminus of Interstate 10 in Santa Monica, California, making it closer to Los Angeles than it is to Orange, away. Likewise, Orange, on the Texas–Louisiana border, is only from the eastern terminus of Interstate 10 in Jacksonville, Florida.

History

West Texas

Interstate 10 replaced and currently runs concurrent with U.S. Highway 85 from the New Mexico border up until the two diverge at mile marker 13. The two highways parallel each other for several miles until Highway 85 continues to head south to the border with Mexico and I-10 turns east towards El Paso. Prior to the interstate system, Highway 85 ran concurrent with U.S. Highway......
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