I noticed that Ohio & Indiana use a asphalt/gravel road composition for some rural roads. This road type you just don't see used in Michigan. We seem to be left with dirt.
This is a typical Ohio rural road situation. You can see where the more privative low traffic asphalt meets a different texture/higher traffic asphalt mix. In Michigan the roadway on the right would be asphalt and a skirt would extend about 20 feet onto the left roadway, then it would transition to dirt.