At the same time, the Central Railroad extended its Fifth Avenue Line south to 36th Street.

[5][6][7] The Atlantic Avenue Railroad, the Central's successor, gained control of the Brooklyn, Bath and West End Railroad, the BB&CI's successor, in January 1893, and soon changed it to an electric trolley line.

[14][15] The pilot program was implemented after similar technology had been tested on the M16 and M34 buses in Manhattan during 2010.

[17] On December 1, 2022, the MTA released a draft redesign of the Brooklyn bus network.

[18][19] As part of the redesign, the B63 would maintain its existing routing, but closely spaced stops would be eliminated.