One is a practice to name some streets without a "Street Type". Herewith, an example:
The street blade isn't incomplete or incorrect. Historically, this street was never called "Reedway Street", despite it being an east-west traffic way (by Portland definition, a named "street"). Whoever named it probably called it "Reed Way", which concatenated over time into a single word, proably echoing "Broadway" and the similarly named "Wardway" (which is the little road that snakes down to the light at NW Nicolai Street and Saint Helens Road, in case anyone's ever wondererd, and was presumably named for the old Ward warehouse which is now Montgomery Park. Reedway, we presume, was either named in honor of Simeon Reed or the unique college that bears his name, which is close to hand).
Latterly, as these signs age, they have been replaced with more conforming signs: SW and NW Broadway are not yet signed "Broadway Av", but N and NE Broadway are increasingly being badged as "Broadway St", as is SE Reedway (and presumably NW Wardway, though we haven't been over there in a while to see.
Needless to say, we like this not. We need to keep Portland quirky.
This picture shows something I love to find–this sign, which can be found at the corner of SE 97th Ave and Harold St (how about that? I man, what are the odds?) shows signs made in the Portland style but the format does not conform. The blade on 97th should read SE 97th AV, not SE 97TH AVE (the unsuperscripted ordinal just kind of jumps out at you, and the street type should be AV not AVE) and the Harold blades street type (ST) should be much, much smaller than it is.
As information design, Portland street blades are spare but very efficient and above all, uniform. Something like this is a happy find–it's a little like finding that postage stamp with the upside-down biplane that was so famous