That is a unique road. It goes through 3 counties without a curve and no big hills for most of it. I’ve driven it many times over almost 50 years.IIRC (it was 10+ years ago), it was 75 between ABQ & Roswell, but as it was dusk/dark, the roads are dead straight and you could see forever I did some stretches significantly above that (oh, yes: rental car).