orangeline wrote:Before moving here I lived in NYC metro area and the subways and elevated portions, with few exceptions, were either constructed outright or modified a long time ago to avoid this kind of traffic interference. I can't help but wonder why the companies that built what became the L didn't do the same on their trunk lines and branches!A good look at the histories of the lines might help. The Chicago "L" lines once had interurbans and freight trains on their tracks and was built by competing yet cooperating companies. By the time the lines came under the CTA umbrella they were basically bankrupt - with not a lot of money for improvements.
The crossovers work ... and have worked for a long time. The flyover will work better.