When demand peaks
The first inbound Metra train leaves Naperville at 4:13, and 14 more depart before 9. Those commuters are in Chicago until the 5 and 6 o'clock trains return, so midday walks fill 10 to 3. Edward Hospital's 4,940 staff run on shift times instead. Walks drop over the December 21 to January 1 winter break.

