30th Street Station

30th Street Station is the main railroad station in Philadelphia, Pennsylvania, and one of the five stations in SEPTA's Center City fare zone. It is also a major stop on Amtrak's Northeast and Keystone Corridors. At the end of fiscal year 2010, a total of 3,787,331 Amtrak passengers used 30th Street, making it the 3rd busiest Amtrak station in the system. The Chicago-based architectural firm of Graham, Anderson, Probst and White designed the structure, originally known as Pennsylvania Station–30th Street (as with other Pennsylvania Stations). The station is listed on the National Register of Historic Places. Its design was influenced by the Northeast Corridor electrification. This allowed the tracks to pass beneath the main body of the station without exposing the passengers to soot as steam engines of earlier times had.