Physical Demarcations of Space in Toronto

Demarcated spaces or neighbourhoods are evident in every city around the world. The rich-poor divide which has embedded class and ethnic characteristics. However in most cities the demarcation of space is an invisible barrier, whereby every neighbourhood has a pre-established use. What i found interesting in the city of Toronto is an example of a physical demarcation of space in a neighbourhood already well known for its elite status - Bloor-Yorkville. Cemented into the pavement of the neighbourhood's major intersections , for example Avenue Rd. and Bloor St. is a sign demarcating this space as "Bloor-Yorkville". The pre-established notions of the Bloor-Yorkville neighbourhood as being one of Toronto's highest end shopping, entertainment, and living quarters, transforms these signs into a much more dynamic demarcation of space.
Are these signs insinuating that once entering this neighbourhood can only certain people enjoy its amenities, thus creating a physical rich-poor divide. Or do these signs create feelings of superiority among those who are able enjoy the luxurious amenities this neighbourhood as to offer. Whatever the feelings may be among those who can enjoy and among those who simply walk through, the physical demarcation of space through the use of a sign within our city's pavement has transformed the invisible barrier of this elite neighbourhood into a physical divide, one people physical cross when the walk passed this embedded sign.
I wonder if any one could think of any other physical divides that characterize Toronto's city scape?