Some are very well kept, others pretty miserable.
So here's what you need to understand about unpaved, dirt roads: a couple of times a year you send out a road grader to smooth them out, occasionally add gravel to softer spots.
The road-grader travels at maybe 15 mph, and in a matter of days covers every dirt road in the county.
If you do that faithfully, you've got fairly nice roads at a pretty cheap price.
Yes, they are dusty, but not necessarily bumpy.
If you fail to keep up with grading, those dirt roads will quickly become undrivable.
Paved country roads cost considerably more to maintain, but also deteriorate more slowly.
But they also can become undrivable after a few winters of neglect.
Bottom line: whatever type road you have must, must be maintained and failure to do so should be a matter of corporal punishment for the officials responsible.
This is what I recommend:
