Well, I took a bunch of toll roads down to GA, and while I didn't have much chance to see many non-toll roads for comparison, I will say this. The volume of traffic and higher speeds would reduce any road here to gravel in weeks. Those roads were maintained. And with onramps set a minimum of 5 miles apart instead of every mile .... slowdowns due to merging traffic were kept to a minimum too.
And quit bitching about the cops. If you're not breaking laws, they're not interested in you. The posted limit is a law, not a suggestion. Break it, and you get what you deserve.