Interstate 35 (I-35) in Texas is a major north–south Interstate Highway running from Laredo near the Mexican border to the Red River north of Gainesville where it crosses into Oklahoma. Along its route, it passes through the cities of San Antonio, Austin, and Waco before it splits into two auxiliary routes just north of Hillsboro. I-35E heads northeast where it passes through Dallas. I-35W turns northwest to run through Fort Worth. The two branches meet up in Denton to again form I-35, where it continues to the Oklahoma border. The exit numbers for I-35E maintain the sequence of exit numbers from the southern segment of I-35, and the northern segment of I-35 follows on from the sequence of exit numbers from I-35E. I-35W maintains its own sequence of exit numbers.