This line is intended to be a trunk line with the T running from Hanover Square and Water Street to 125^th Street/ Lexington Avenue in Manhattan and the Q running from 125^th Street/ Lexington Avenue to 63^rd Street then via the 63^rd Street Tunnel to 47^th Street/7^th Avenue and then to Coney Island. The map  is from the MTA web site

For details on the two lines see the Q extension and T train pages.

The line is intended to be built using tunnel boring machines, cut and cover and in some cases mining. The outlook for completion is brighter since the federal government has authorized final design work.

This site will assume that MTA has decided on the Water Street alignment rather than the Nassau Street Alignment which would reuse the now closed platforms at Bowery and Canal. We make this assumption based on the above map