The original US 66 followed an east-west line across the Texas Panhandle from Glenrio, New Mexico and Texas to Texola, Oklahoma. When Interstate 40 (I-40) was constructed most of the highway was upgraded in place, reducing construction costs and keeping existing towns close to the new highway to minimize tourism losses.
The original US 6 ran east-west across the Texas Panhandle from Glenrio, New Mexico and Texas to Texola, Oklahoma. When Interstate 40 (I-40) was built most of the road was upgraded in place, lowering construction expenses and keeping existing towns near the new highway to avoid tourism losses.