As of 2 months ago, there was construction just east of Kingman (which is good because this stretch really needed it), Flagstaff (which is good because this stretch really needed it as well), then by Holbrook, another long stretch just west of Gallup (this stretch is always under construction it seems), and at Coors Rd in Albuquerque. The two that will probably slow you down the most are, the construction by Gallup and the construction in Albuquerque depending on what time of day you roll through there. Use caution on I40, traffic has been really thick lately and there have been quite a few bad accidents between Gallup and Albuquerque. Traffic thins out quite a bit after Santa Fe though.
I recommend checking out What A Grind and The Cafe in Trinidad for some good food and coffee