>>1054661Not autistic, but connecting Metra's separate terminals into a through-running RER-style commuter system has been an elusive goal for over a century now. The 1914 Chicago Club report on this is beautifully illustrated and well worth a read.
https://archive.org/details/throughroutesfo00hookAnd here is Alon Levy's modern iteration of a through-run scheme
https://www.google.com/maps/d/u/0/viewer?mid=1GSq16WGfi0u34opAQWmifYEMUz4