UP is doing trackwork on the CHI-STL route, so trains 300-303 are being substituted by bus service. If you are south of Springfield, and were planning to take 300 northbound, make alternate arrangements, because there's no substitute bus from St. Louis corresponding to 300.
"Buses leave earlier", but no other details from the service disruption notice. Maybe amtrak.com has more details.
"Buses leave earlier", but no other details from the service disruption notice. Maybe amtrak.com has more details.