Ordinary subway platforms can simultaneously host four trains at extreme volume

Evidence

and at the same instant the downtown express entered the station, its seven burgundy-colored cars thundering shrieking roaring at 40 mph between the slowing locals. Immediately thereafter the uptown express, as if anxious not to miss the party, showed up around the curve from Seventy-second Street and blasted into a station already occupied by three other trains, two moving, one now stopped. — George Michelsen Foy, Zero Decibels, 31

Categorization

• corroborated: 2 independent passages support this claim — George Michelsen Foy, Zero Decibels: The Quest for Absolute…, 31