McKinsey has a lot to say about infrastructure development. This article is only on in their blog series on rethinking infrastructure. I suggest not only this one (about credit risk) but the others shown below.
I think it is interesting that they value transportation infrastructure on its productivity improvements in transportation alone. I’ve been modeling transportation’s impact on other industry sectors, and I find that it’s one of the few ways of generating increased productivity in other sectors as well. In fact, you can map exactly which sectors will benefit from added value in transportation. That tells you where to look for gains, and estimate the economic leverage improved transportation gives.