I can remember 1965-1967, AM rush hours. The M line ran from Coney Island local to Kings Highway and then express to Prospect Park, with the final passenger destination Chambers St. The line's equipment was Brightliners, exclusively. There was also a TT West End local with signs of Coney Island and Chambers St., also with Brightliners exclusively. Thus, four different lines used Track 2 at Dekalb Av. in the AM rush: M, QT, RR, and TT.