Lee Bey of The Urban Observer directs our attention to a CTA study I've not heard of before. The Chicago Central Area Transit Plan made a case for tearing down the Loop's elevated lines and replacing them with subways that connected with the existing lines in the rest of the city. Unfortunately the project ended up $500 million short so it died before it ever got off the ground. But I think Lee is correct in asking if the city will ever dream that big again.