 The second phase of construction would extend the Second Avenue line south from 34th Street in Midtown to Lower Manhattan , with stations at 23rd , 14th , Houston and Grand Streets , Chatham Square , Pine / Wall Streets , and a terminal at Whitehall Street . Free transfers would be offered to existing lines at 14th Street , Houston Street and Whitehall Street , while Grand Street would be reconstructed . Pine @-@ Wall and Whitehall Street stations would both have four tracks ( two platform levels with two tracks each ) in order to increase the capacity of Whitehall Street terminal above 30 trains per hour , and to improve passenger flow . Also during this phase , service on the upper Pelham Line would be extended to Co @-@ op City , Bronx . A third branch of the Second Avenue line to replace the Third Avenue El in the Bronx would also be built , running adjacent to the right @-@ of @-@ way of Metro @-@ North ’ s Harlem Line on Park Avenue . 
