Why have all of the secondary roads been disappearing in Portland, Oregon? It looks like someone has decided that only highways (e.g. roads that have a ref=) get to be secondary roads.
It seems like there should be a distinction between two and four lane roads. Looking at the current map, you have to guess the major streets. What's the point in that?
I can assure you that SE Hawthorne is more busy than SE Harrison. http://www.openstreetmap.org/?lat=45.5108&lon=-122.63488&zoom=16&layers=B000FTF