The Port Authority will open the first platform for the new station, with service to Hoboken.
Officials say 'Platform A' is a fully modernized PATH station, and will be the center of the new World Trade Center transportation hub.
Other platforms will open in phases through next year.
The fully modernized Platform A features new lighting, speakers, illuminated signs, escalators and elevators.
The new WTC Transportation Hub will include several similar platforms and will continue to open in phases through 2015, providing Lower Manhattan with more modern transit and retail spaces in the near future.