How the Dutch build a tunnel under a highway in one weekend

Ingenious!

Once Wall Street and the City of London are forced back into their proper role of subservience to the rest of the economy, we are going to be doing a LOT of this kind of work. Think of building rail mass transit systems in Los Angeles and Mexico City and Cairo and Lagos and all other cities, with the same densities of route miles and stations as the systems in Paris, Moscow, and Tokyo.

Here is a nice list, for North America only, of Openings and Construction Starts Planned for 2017. This is probably around only one or two percent of what we will end up doing in the next half century.