2 westbounds illustrate the term "Racetrack" at Naperville! In the foreground is CHI452 on Main 3 while the EOSSCM light power is on Main 1. Both movements are bound for Eola Yard.
Old #11 hustles along the Racetrack and under one of the fast disappearing CB&Q style signal bridges at Naperville. Z-STPCHC is parked on Main 2 in the background.