You're correct, but if you're traveling east from Flagstaff, you can go south (right) at Albuquerque, then take I-10 east to Houston, thus avoiding the nightmare traffic of DFW.
If you’re traveling with my daughter-in-law you take the route she mapped out. LOL. When we drive out, we go to Scottsdale first and take I-10 to what seems like almost the end of the world from Houston and then head north in Arizona. Seems like a lot more trucks on I-40 than on I-10 and we had a lot of wind in southwest Texas this year. Just a long way.
Didn’t realize that all the construction was going on in the Dallas area. At least we hit there about 2 a.m. so traffic wasn’t so bad.
Maybe one of these days Trump will get rid of TSA and we can fly once again.