Hey Ivan, my wife and I are from Birmingham AL and lived in DFW for a long time so we are experts on this route by necessity. The interstate, in general, is pretty good. There are some rough spots in Shreveport, Monroe and Jackson MS but for the most part it's an easy drive. I will say going through Birmingham, make sure you aren't hitting rush hour and go I-459 and bypass the city, traffic can be seriously bad. As far as Atlanta? All bets are off, traffic is a nightmare at all times, and there is not really a good way to get to I-75 south without going either I-285 or to I-75/85 south off I-20. If you are dead set on avoiding Atlanta I guess you could go I-65 South to Montgomery AL and then I-85 east to I-75 South although this is a pretty long detour. Hope this helps.