The system would be changed from looking like a "Z" system on a map to an "H" system. One trunk would run via the new Lexington Avenue Line down Park Avenue, and the other trunk would run via the new Seventh Avenue Line up Broadway.
The system's configuration would shift from its present "Z" pattern to an "H" arrangement. One major line would proceed along the new Lexington Avenue Line on Park Avenue, and the other primary line would ascend via the new Seventh Avenue Line on Broadway.