"LRTs displace all the poor people"?

[Memph]

Do you have examples of FSR's for other cities downtown cores? 3 seems very low.

I would say 3 is pretty low for downtown, but ok for downtown adjacent neighbourhoods. 

Barcelona's Eixample was calculated to has a floor space to area ratio of 2.65.
http://densityatlas.org/casestudies/profile.php?id=92

However, that would include streets and parks. You also have to take into account that Barcelona doesn't have uniform building heights, there's many in the 8-10 storey range, but also others around 3-5. That website probably include spaces like elevators and stairwells in the building area too though, they probably just multiplied the building footprint by the height since it can be difficult to find data on just the floor area of the units.

More examples here:
 http://densityatlas.org/casestudies/inde...ale&s=desc

The other thing to keep in mind, is the more streets, parks/squares, as well un-redevelopable low density buildings* there are, the less of a need there is for new developments to have courtyards and setbacks to ensure access to light, which means higher densities can be achieved.

*ex many public buildings, or historic buildings