Originally, a network of passageways and ramps loosely connected the various lines with each other, causing congestion during peak hours. The transfer mezzanine, also known as the IND mezzanine, replaced these ramps and made several adjacent entrances redundant. In January 2010, reconstruction of the transfer mezzanine over the Fulton Street IND platform resulted in traffic flow changes. The transfer passageway leading to the Broadway–Seventh Avenue Line platform at Fulton Street had previously been modified. Effectively, all transfers were made through the IND platform, serving the Eighth Avenue Line.