bellvue ave, bellvue court and bellvue place intersect in cap hill. to answer the OP, those directionals are required to uniquely identify addresses in Seattle

bellvue ave, bellvue court and bellvue place intersect in cap hill. to answer the OP, those directionals are required to uniquely identify addresses in Seattle: http://en.wikipedia.org/wiki/Street_layout_of_Seattle#Directionals http://en.wikipedia.org/wiki/Street_layout_of_Seattle#Direct... note that they're prefixes for east-west streets, but suffixes for north-south avenues. I've lost deliveries before when I've omitted the directional, even if the street #/street name was unique to the zip code.