I appreciate creativity and ingenuity and would love to see more of it in design in Candaa.   I agree with you though,...this design misses the mark for a number of reasons that largely have to do with practicality and livability.

And, the first thing I thought when I looked at this photo was,....what if there were a material earthquake in Toronto?   What would happen to this structure?   Do you really want people living in that kind of situation (on a viaduct bridge) where a mid-sized earthquake of about, say, 6 on the Richter scale could do a lot of damage?