Comment by mschuster91

> I also agree with the author in that I'm not sure what elevated trains did to hurt people.

You need to either build them in right at the start of a new development or you gotta demolish a lot of housing - similarly to what was done in a lot of US cities when the highways were built [1].

[1] https://www.reuters.com/world/us/us-freeways-flattened-black...