Where is the busiest highway in Texas?

The busiest highway in Texas is Interstate 45 (I-45), also known as the Gulf Freeway. It runs for approximately 350 miles from Galveston to Dallas and is one of the most important transportation corridors in the state. I-45 carries a significant volume of traffic, including both passenger vehicles and commercial trucks, due to the major cities and economic hubs it connects, including Houston, Conroe, and Dallas.