Before the U.S. Route system, this system of interconnected highway from New Mexico to Oklahoma was part of the Texas highway system and a portion of the Ozark Trails which closely paralleled the Chicago, Rock Island and Pacific Railway.
Before the U.S. Route system, this route was a system of interconnected highway from New Mexico to Oklahoma, and was considered a part of the Texas highway system from New Mexico to Amarillo, and was a portion of the Ozark Trails. This entire route closely paralleled the Chicago, Rock Island and Pacific Railway.