Hey Dian,

Yeah I’ve gone overboard, I used the Vicmap transport dataset matching the  hierarchy between that and OSM, so class code 0 = freeway, 1 = highway, 2 = arterial, 3 = sub arterial, 4 = collector. In OSM Freeway, Trunk, Primary, Secondary, Tertiary.

In some areas this already matched perfectly but then in others it’s completely different. I cross referenced with Melways and it is seems to be getting its data from the same source, Google just marks all level 0-2 as the same arterial tag. 

Should I have gone solo and made so many changes, no.