Adding street cars and limiting car traffic would be an excellent solution in Manhattan. Installing street cars are probably two orders of magnitude cheaper than digging the equivalent subway, and we have too many cars as it is. The second avenue subway is basically a joke; it only has three stops on second avenue, and construction will be shut down without doing any of the additional phases of construction that would take the subway further south.

They should also close 1/2 of the avenues and turn them into parks. It would greatly increase foot traffic to the businesses on the street, and would make Manhattan much more livable.