Once you get to New Mexico, the speed limit's 75. Which is good. There's alotta nuthin' in New Mexico. ;-)
New Mexico is one that few states that seems to have a clue about traffic.
They don't make you slow down when driving through cities on the interstate. This makes traffic flow much better, especially with all the hills/mountains out there.
And it's a good thing it's 75, since I'm going to be driving from Amarillo to Flagstaff during day 4 of my trip. I will definitely be enjoying those high speeds!
75 is a speed suggestion in NM. :-)
There have been time when I have flown past their highway patrol at about 80 to 85 and they just smile and wave.