Tag:highway=trunk
Brazil Rodovias nacionais (national highways, such as BR-262), vias expressas urbanas (urban expressways), 70-80 km/h

Tag:highway=primary
Brazil Via arterial urbana (urban arterial way), estrada estadual (state road), >50-60 km/h

Tag:highway=secondary
A highway which is not part of a major route, but nevertheless forming a link in the national route network.

Pra isso se usa boundary

landuse=residential
Quanto ao suburbs e neighborhoods ok, ja mudei.

Ta com toda razao, mas como tu acha essas alteracoes?