The "ridership of the entire Blue Line" number isn't particularly interesting here; very few of those people are going to the airport. A more interesting number

The "ridership of the entire Blue Line" number isn't particularly interesting here; very few of those people are going to the airport. A more interesting number is entries at the O'Hare Blue Line station, which is about 10,500 per weekday, or 440 per hour. So this design could accommodate something like a 5x increase in transit-to-ORD.