I do believe that it's mentioned in all cities that the 'omnientrance' that leads to the various Wards is ALSO the entrance to 'downtown' or 'where the majority of the city lives'.
I do sincerely prefer a take like that because it reduces the size of the map we need to walk through to get to places (if a city is too big it WILL be a pain, even in goddamn RL *lives in a capital*), and will give a believable excuse of where do these people live.