So OSM should not reflect the legal status of a roadway within the state, instead going off personal opinion? That's just bad mapping, and not what OSM is about.

The interchange at 112th is a full-service interchange with ramps in all directions. It's not a "minor junction", whatever that means. Don't make up terms to make a point. 

SR-500 is 55 until about halfway between the merge from 112th and the signal, where it drops to 40. Never mind that, though. SR-512 drops to 45 shortly before the Steele St interchange about a mile east of I-5, yet it maintains its motorways status on OSM all the way up to the off-ramp signal from southbound I-5. Why? It's considered a freeway by WSDOT. We don't get to decide these things. It's our duty to map them accurately... different from state maps is not accurate. 