Major Texas–Mexico Border Highways: I-35 and I-10

The two primary Interstate highways connecting Texas with Mexico are:

1. Interstate 35 (I-35)

• Route: Laredo (border) → San Antonio → Austin → Waco → Dallas/Fort Worth → Oklahoma border.
• Role: North–south backbone; premier trade corridor for US-Mexico commerce (NAFTA/USMCA). Handles massive truck volumes.

2. Interstate 10 (I-10)

• Route: El Paso (border) → Van Horn → Fort Stockton → San Antonio → Houston → Beaumont → Louisiana border.
• Role: East–west southern tier route; links West Texas, Hill Country, and Gulf Coast to Mexican border at El Paso/Ciudad Juárez.

Both are designated NAFTA Corridors and critical for cross-border supply chains, tourism, and regional mobility.