Sorry if I misled anyone. The story intent was to discuss the overall BRT plan of a large loop system which would have connected the three East River crossings on both the Manhattan and the Brooklyn side. The first part of this plan was the Park Row terminal, the proposed Southern end of the loop in Manhattan , the Brooklyn Bridge crossing and on the Brooklyn side of the Brooklyn Bridge , the Sands Street complex which was the proposed Southern end of the loop in Brooklyn. This part of the plan was operational prior to completion of El service on the Williamsburg Bridge. The plan as an El Loop never went any further than this development because of the City's insistence on a Centre st Subway in Manhattan alternate plan.
The Centre st subway did ultimately lead to the completion of a Loop service configuration using the Manhattan Bridge The Nassau St extension and the Montague st Tunnel with the Dekalb Ave complex in Brooklyn. The Eastern division operations would use the Centre St Subway to reach downtown Manhattan through Chambers St. The P_ark Row, Brooklyn Bridge Sand Street part of the loop scheme became superfluous and was removed form service by 1944.