The private sector is not a fast mover in infrastructure. It's the prototype public good, where the gains are vastly redistributed to society rather than being

The private sector is not a fast mover in infrastructure. It's the prototype public good, where the gains are vastly redistributed to society rather than being easy to isolate into a transaction. A road not only reduces your travel time from point A to B, a service worth $C to you. But also enables economic activity along it's path, makes it possible for you to get a job in B in the first place, etc. and all these are worth a large multiple (N * $C) for which nobody can be charged. The net effect is that there is drastic under-investment from the private sector compared to the needs or the economic potential of a society with good infrastructure.