Not sure if this is the right place to put this, but this is probably of interest:
https://idot.illinois.gov/content/dam/soi/en/web/idot/documents/transportation-system/fact-sheets/2023%20Illinois%20State%20Rail%20Plan%20Main%20Document.pdf
I'm planning on doing a full transcontinental trip of the US by rail both ways. I've decided that the Chicago-West Coast leg will be made using the California Zephyr one way and the Southwest Chief the other way, but I need advice on which one should be the westbound trip and which one should be...