Numbers alone don't tell the whole story. I wonder how states rank when going with percentages instead.
They break it down by fatalities per population, per registered vehicles, per licensed drivers, and per miles driven. In all of those, Texas is about average. If you have an agenda, you can break it down between red and blue states, or by economic status, education level, worker class, whatever, and think you have discovered something important, because you think correlation equals causation. Essentially, fewer traffic related deaths occur in denser, more urbanized states. This is not surprising since people drive more and faster in less populous states and less and slower in denser, more urbanized, and more populated states where mass transit plays a factor, as well.