I am aware of the project and know it is to be completed in the distant future.  While I am generally against mapping things that don't exist, this one is coming to fruition and construction has begun.  (unlike those "razed"/"historic" railways that were completely demolished and removed, yet keep getting readded to the map by a few editors)

My issue is that it is tagged as layer=-3 and level=-3, even on the parts that are clearly going to be above ground or a bridge.  This is clearly incorrect on the side by Secaucus Junction.