If you look around other parts of the U.S., you will find very few other examples of massive annual fairs being hosted on sites "embedded" in urban, residential neighborhoods.
The only ones that come to mind are St. Paul, Minnesota; Columbus, Ohio and Phoenix, Arizona. The rest are typically located in commercial zones and cut-off from residential neighborhoods by freeways, railroad lines, etc. Even those seem to subsist without the acres and acres of paved parking lots like we have at Fair Park.
Maybe there's a good reason.