Since I'm not allowed to 'necropost' by bumping perfectly good threads, I'll make a new one instead.
Would it be feasible for the MTA to generate income by reopening some of their larger corridors, most notably their Sixth Avenue tunnel?
http://forgotten-ny.com/2015/09/under-6th-avenue/
I know that the 'Gimbels' tunnel was recently planned to be renovated, but that unfortunately fell through due to the city's pyrgrophobia. However, while comparatively less useful as a transit corridor, the Sixth Avenue tunnel is absolutely enormous and could easily be fashioned into a money-making shopping strip, especially considering its prime location.
http://forgotten-ny.com/2015/09/under-6th-avenue/
This seems like massive potential being wasted!