The first basement contained a tunnel linking to the original Pennsylvania Station as well as to 34th Street–Penn Station on the New York City Subway's Eighth Avenue Line (). Through Penn Station, this tunnel also connected to 34th Street–Penn Station on the New York City Subway's Broadway–Seventh Avenue Line ().
The lower level included a passage that linked to the original Pennsylvania Station and also to 34th Street–Penn Station via the Eighth Avenue Line. Furthermore, this passage allowed for travel between Penn Station and 34th Street–Penn Station on the Broadway–Seventh Avenue Line through the station.