about the manhattan bridge see acps i read the history site on the w train page it says when all four tracks on the manhattan bridge were restored on february the w was changed to its final service pattern as a weekday local between whitehall street south ferry and queens this means the w was local and the n was express that's when the manhattan bridge's north tracks reopen for the b and d trains read more about the service history of the b d n q and w train pages so you can get a better understand you meanie d