Apple belongs to the category of Fruit.
What category do street, road, and avenue belong to?
There are categories, and categories of categories, and so on, and any of these categories may or may not have labels already in the language, as Colin pointed out. If a set of words has a word for that set, that word is called a hypernym.
And the semantic category depends on the particular collection you want to name (the collection may not be coherent).
But for these three words, I find that the best encompassing hypernym is
even though 'road' is one of the things you want as a subcategory, it works as a generalization of them all, a large two-way ...thing... to travel on. (A word that is its own hypernym is an autohyponym or autohypernym). It doesn't have to be paved but a 'path' is too small to be included. I'm not sure about 'alley'. 'Boulevard', 'interstate', 'route', 'lane' are all kinds of roads.
'Street' could be a hypernym by the same reasoning, but as a native speaker, it does not feel like a generalization as much as 'road' does.
The hypernym for these, whether it is 'road' or 'thoroughfare' or something else, is not the same as a word for road names, that is, the things we attach to the name of a road when we say "Go two blocks, turn left at X". These are called odonyms (looked it up just now in Street or road names in Wikipedia). At the end they give a list of such names/odonyms which names you'll notice are not all acceptable as a kind of road (despite the fact that it is acceptable as the name of a road, e.g. 'close', 'mews', 'gate' passage', 'trail').
If the poster is asking what to call that part of a street name, there are three terms I am familiar with: - street (type) suffix (United States Postal Service: https://www.usps.com/send/official-abbreviations.htm; English Wikipedia article on street names) - street type designation (English Wikipedia article on street names) - generic street name (English Wikipedia article on street names)
On a form, the following terms might be used to generate the desired address given:
[house number] 732 [direction] N. [specific street name] Capitol [type] St. [quadrant] NW [secondary unit] Ste. 100 [locality] Washington [state] DC [postal code] 20401 [country] U.S.A.
In cases like The Embarcadero, there may be no street type suffix at all, only a specific street name.
In El Camino Real, the actual street type designation (camino, "road") appears in the middle of the specific street name (el . . . real, "the royal . . ."), but the entire street name might well be considered a stand-alone (suffix-less) specific street name for the purposes of a form.
Benjamin Silver Spring, MD
In the specific context of mail addressing, the United States Postal Service lists about a hundred of these, and calls them 'street suffixes'.
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