What happens when you build low income residential units upwards and not outwards? Those familiar with CPTED will recall Oscar Newman's Defensible Space work in the 1970s and 1960s describing how this is usually a bad idea.
In places that do just that sort of thing like New York, Chicago and Toronto, you end up with vertical poverty.
The United Way in Toronto has just released a fascinating study called Vertical Poverty documenting disparity in 3-D urban space. Toronto has for decades tried to make the sprawling and cost inefficient suburbs more efficient with high rise residential. Vertical Poverty tells one chapter in that sad tale.
It also describes the San Romanoway apartments solution that led to some of the earliest breakthroughs in SafeGrowth. Check it out HERE.