 I-10 is one of the very few Interstates that has at-grade intersections (roads that intersect it at a 90-degree angle, as opposed to an overpass or underpass with on and off ramps).These are private access roads (mostly from large ranches) which occur over a limited stretch in western Texas.The stretch from Kerr County to El Paso County has an speed limit, which was the highest in the nation, until the opening of the southern section of Texas State Highway 130 on October 24, 2012.