That's the way the BMT Broadway, Brooklyn line operated in the '50's when the equipment was BMT Standard A/B; which did NOT allow for numberical or alphabetical identification...lights only please. For the morning "rush" ALL trains from 168th Street to the then terminal stop at Broad Street stopped at all stations prior to Broadway Junction. From there the stops were Broadway/Myrtle and Marcy Ave before crossing the bridge into Manhattan where all stops to Broad Street were made.
Jamaica bound service made all stops from Broad to 168th. In the afternoon the reverse was in effect.
As a boy going to school in Brooklyn, I'd take the Broadway El from 168th to Broadway/Myrtle. Memorised the stations we passed between Broadway Junction and Myrtle...remember them to this day...Chauncy, Halsey, Gates, Kosciusko. In the '60's took the train from Forest Parkway to Chambers, memorized the ones between Myrtle and Marcy...Flushing, Lorimer and Hewes...where my mother lived in the early 1900's. By that time the train was J, skip stopping with the KK until Broadway Junction where the KK ran local, while the J did it's EXPRESS thing.
The ride acorss the Williamsburg was better than a amusement park ride...and for less than a quarter in those days.
Rodger...left New York in '72, still have family on the Broadway Brooklyn route.