FOR MOST OF US, a toll road is just another expense. But for a family with vast resources and a long investment horizon, it can be something quite different: a source of income.

我们中的大多数人看来，收费公路不过意味着又一项开销。但对一个拥有大量资源和长期投资眼光的家庭来说，它却有着截然不同的意义──那可是一项投资收入来源。

In growing numbers, rich families are investing in infrastructure, putting their money to work on remote mountaintops, bustling harbors and across deserts the world over. This broad category covers the structures and systems needed to keep economies running and growing. So think highways, public transit, power plants, telecom backbones