<p>The United States Postal Service prefers addresses to be written with abbreviations used, and they maintain a list of official abbreviations. I suppose they really only care about addresses written on physical mail, but then again this is the primary purpose of mail addresses.</p>
<p>I know of multiple examples of places where the street name in the official addresses of houses on a street does not exactly match the name of the street itself. There is therefore no reason to insist these values should match.</p>
<p>My conclusion is that address data should appear in the data as it properly does on a piece of mail, which includes using USPS standard abbreviations, and deviating from the road name in other ways where the postmaster has prescribed such deviation.</p>