Train #8(10) is currently almost 10 hours late. There will be on-time buses MSP - CHI.
How can they be "on-time" buses if the train is nearly 10 hours late? There's no way they can make that time up driving straight through to Chicago, is there?
For passengers boarding at MSP and beyond, a few buses depart MSP at the regularly scheduled departure time. Usually, depending upon passenger counts, there will be one or two express buses that go straight to CHI and there would be a bus that will make all the usual stops.
The passengers on the train don't make up any time but passengers boarding at MSP or beyond have the option of taking the on-time bus or waiting for the very late train.