I earned my Ph.D. in the interdisciplinary program at the University of Missouri – Kansas City. When asked my discipline, I simply say “rhetoric” because that’s entirely true, and it’s a shorter answer than explaining I also took courses in communications, linguistics, and political science because, well, you know, rhetoric is a really big thing encompassing all of human communication and therefore all of human action, and so I ended up studying why it’s important for students in the humanities and social sciences to write publicly.
I’m the quintessential interdisciplinary academic animal.
Let me suggest another discipline that ought to be considered in planning the “equitable” city (or any other kind of city that strikes your rhetorical fancy): culture studies.
Because … the study of culture explains things that, say, engineering cannot (just as engineering explains things culture cannot). One of the things that culture studies explains is why, for example, the Dutch ride bicycles so much for basic transportation. I have argued many times (with success?) that their mode share has less to do with infrastructure (especially the terrible stuff in Amsterdam) and more to do with culture (I don’t agree with the spin of this article, but the importance of culture comes shining through).
So listen up urban planners: culture studies. Check into it.