I'm trying to figure out where the surface type data comes from for Strava. I know some of it comes from OSM(OpenStreetMaps) and that's referenced here - https://support.strava.com/hc/en-us/articles/8471952550669-Route-Terrain, but there seems to be other data being sourced as well.
Old Ferry Rd and Groveland St both show as being paved roads, which is accurate.
When I go to look at Groveland St in OSM there is a surface tag saying that it's asphalt, so that makes sense.
But... When I look at Old Ferry Rd, there is no surface tag present.. So how does Strava know that this road is paved???