The signs may not say so, but from my time in TX that was pretty close to par. Reminded me of the DC beltway in that a wreck was about the only way to make a cop visible.
As for Maine, on several trips in the mid/upper part of the state I went an hour or more at a time without seeing another car on my side, and very very few on the other. 'Course, the most effective speed deterrent up there for anyone with half a brain is spelled 1,000 lbs of moose.
