I was only up there for a week, but Chicago's CTA Ventra cards seem to work in this general way. Getting on the bus or train involved tapping the card on a read

I was only up there for a week, but Chicago's CTA Ventra cards seem to work in this general way. Getting on the bus or train involved tapping the card on a reader. They're also Mastercard branded with a magstripe and can be loaded up with funds for general use, as I understand it. I was up there last fall and they were just starting to roll them out.