Riding around rural northern Virginia a bit reminded me of a rule of thumb:
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If a road has “school”, “church”, or “old” in it’s name, it has a good chance of being an interesting road to ride down.
“church” and “school” roads are presumably built when there isn’t much else in the area, and therefore tend to wind around farms and creeks and hills.
“old” roads tend to be just that. Older roads that are no longer sufficent for modern traffic. They often tend to be two lanes and twisted.
Another rule of thumb might be “Roads named after neighboring towns tend to be interesting”. These roads tend to be old as well, and usually pretty long, and often posted at a higher speed (45 or 55 mph). If they throw in an “old” all the better.