Earlier quoted context omitted.
there are overhead elevated train tracks, and they work just fine No, they don't. They add a massive amount of noise and other pollution to the city, and block light and air, turning normal city streets into seedy alleys. (Ex: Wabash before the recent renovation) They seem a lot cheaper to build and maintain than tunnels Build, probably. Maintain, no. The elevated structures require a ton of maintenance that is ongoi…
These are electric trains—what pollution? Noise isn’t much higher once you’re even a block away. And light and air is a matter of setbacks. Lake and Wells are hardly seedy alleys. There is more light standing right under an L track than in NYC.
I suspect you've never been in a subway tunnel and noticed all the grime and dirt spewed all over the walls and ceiling by electric trains.
Noise isn’t much higher once you’re even a block away
Now I know you've never been in a city with an elevated train system. I once lived nine blocks away from an elevated train, and I could hear it all day and all night.
And light and air is a matter of setbacks
You can't set back a building that's already built, and you can't take away air rights from a property owner without massive compensation.
There is more light standing right under an L track than in NYC
More is not the same as optimal. Why should any of the public's light and air be removed if it's not necessary?