“Perhaps there is a real estate angle..”
But of course...and many other angles as well. Everything...EVERYTHING..in shitcago is premised on payoffs, graft, corruption, bribery, blackmail etc.
Perhaps they plan to turn parts of the El to an elevated park/retail development somewhat like the High Line Park on Manhattans West Side. I have walked that elevated freight rail line transformed into a public park and it is something worth seeing. There could be a ton of money to be made leasing retail and business space on something like that.
Here is the link to the High Line: https://www.nycgovparks.org/parks/the-high-line