Originally Posted by brentlarue

Can you elaborate on what makes a good ride? How fast is too fast? What kind of things do you consider unsafe (ie. riding on a shared walkway)?

My friend and I are making an app to solve this because we too felt the pain, just for fun. He made a route planning app for running called Trail Router. Tons of people replied to the thread asking for a cycling version, you can find the original threads on Hacker News and r/running with a quick google search.