 The station consists of three levels.The shallowest below ground, the IRT Eastern Parkway Line platforms, is at the same level as the LIRR's Atlantic Terminal railway platforms and are only below street level.The second level below ground is the BMT Fourth Avenue Line platforms, which are deep and have a mezzanine, and a connecting passageway to the IRT Eastern Parkway Line and BMT Brighton Line, above the platforms.