I635

Interstate 635 (I-635) is an auxiliary Interstate Highway in Texas that serves the Dallas–Fort Worth metroplex. It is officially named the Lyndon B. Johnson Freeway. The highway forms the eastern portion of the Dallas-area beltway, running in a roughly semicircular arc from its southern terminus at I-35E in the southern Dallas area to its northern terminus at I-35E in the northern Dallas area, and it intersects major routes including US 75 (Central Expressway) and I-20. The route facilitates regional through traffic and provides access to residential, commercial, and industrial districts, as well as Dallas-area airports. I-635 is part of the National Highway System and is maintained by the Texas Department of Transportation (TxDOT).

History and features: The I-635 designation was assigned in the 1960s as the Dallas freeway network expanded. Segments opened over several decades, with the eastern portion undergoing a major widening project in the 2000s known as the LBJ Express, which added managed toll lanes and rebuilt several interchanges. The LBJ Express was completed in the early 2010s and improved capacity and traffic flow along the corridor. Ongoing maintenance and occasional improvements continue under TxDOT auspices. The express lanes operate as toll facilities under a public-private partnership.