[sstrudeau]

Can major hub airports handle 4x the traffic of smaller planes vs large planes (I honestly don't know)? In the NYC area, in particular, air traffic congestion is a huge problem so "adding more flights" is not a practical option (unless those flights can be stacked more densely).

There have been many solutions proposed to this problem (usually expanding smaller, "nearby" airports) but it seems to me a better option would be to expand and improve regional passenger rail to reduce demand for short and medium-leg flights thus freeing capacity for longer distance flights.