Someone on another Forum pointed me at this website
https://roadcurvature.com/map/ which shows the curvature of roads for those who think straight lines are boring!
It seems to be based simply on analysis of the map data (there appears to be no way to screen out roads with only 30 or 40mph limits that might be twisty, but not exactly fun at those speeds
)
Still, it's a great resource for bikers
Here's "Cottage Corner" on the Morestead road...
https://roadcurvature.com/map/?threshold=low#map=13.981/-1.2432/51.0149