How good are American roads?

It's interesting New Hampshire leads the way for interstate highways and it is a 0% income tax state.

I live in NY but I went to New Hampshire last month for the first time. I have to say the roads were really good, even in more remote areas in the White Mountain region. Heck even the dirt road I had to go on for 1.5 miles was in good shape for a Hyundai Elantra rental car.

On the flip side, the roads near me are really bad in some spots. It's torn up pavement with massive pot holes for years in a decently trafficked area literally 1 minute away from a major highway.