Places like New York have the highest living costs. One reason, of course, is scarcity. The demand for living space in this area is so high because of the nice views and other benefits there are. How to increase the amount of living space in the city? This article talks about combining bridges, or highways, and incorporating other aspects to them so that they can be used for more than one thing. This also relates to maximum efficiency in a way, because something is being used to the best of its ability. Why just use a bridge or highway to merely go from one place to another? What if, in New York, more apartments were built underneath bridges? Architects nowadays can design masterful plans to make this idea feasible. Those that lived in them would still get a great view and those types of benefits. Adding these would increase the amount of living space, helping the fact that good places are scarce. It also uses the bridge or highway to its full potential, as a bridge or highway can do more than just get people from place to place. It does not only have to stop at adding apartments, things like shops and restaurants can be added as well. A mere highway could suddenly turn into a large metropolis area and reap other economic benefits as well.