There's a feature in Google Maps called "Google Map Maker" - in the lower right corner of the old Google Maps (not the new version I've seen), click that and you can add new bike paths or redesignate roads that are "bike-friendly". I encourage you to make any edits as necessary. I recently redid the map for the Wilmington, NC area to make the bike routes line up with the City of Wilmington's bike map along with what I've seen from riding around.