Borough Hall on the IRT Broadway – Seventh Avenue Line, opened on April 15, 1919, has two levels. Each level has one track with a side platform on the south side. Manhattan-bound trains use the upper level while southbound trains use the lower one.
Both platforms have their original IRT trim line and name tablets reading "BOROUGH HALL" in a serif lettering style. Tablets showing images of Borough Hall run at regular intervals on the trim line.
The signage for the IRT platform is unique among the mosaic signs in the NYC subway system, featuring colorful, rounded tiles embedded in a gray matrix. The type font, while bearing some similarities with other Beaux-Arts type styles in the system, features pointed serifs, found only on a handful of other stations, including De Kalb Ave., Fulton St., Canal St. and Flatbush Ave.
For a fascinating history of the Borough Hall subway signage, <click here> to see the "Forgotten New York" website's page on the subject.