I live on the N/NE border in Seattle, but fortunately I'm on an avenue, so the entire street is N.
It's an interesting system that I'd never seen before I moved here. Streets are East/West. Avenues are North/South. The compass direction indicates the section of the city that the street is in. And the directional goes up front on streets and on the end for avenues.
It sounds like Portland has the same system - how widespread is it? Is it a pacific NW thing?