The question that we cannot answer for Manhattan data is what if Manhattan added a few North South lines or I can think of hundreds of different things that Manhattan could do. I don't live there and I haven't studied the data in depth so I couldn't tell you what is a good useful thing for Manhattan to do. But I can tell you that there are lines that would over the next few decades greatly change how people in Manhattan and the rest of the city live. Unfortunately, Manhattan is particularly bad about the costs and so they can't even afford to remove the obvious bottlenecks much less a whole new line that would over time be make the city much better.