I don't think there would be very good roads without government. Do you think individual companies are capable of organising nationwide infrastructure projects?
It actually is the private companies that build the roads in most countries. Government collects the taxes and outsource the actual job of building.
but we are talking about organizing... In the sense of figuring out which community needs what and supplying it at the national (or international) level.
Somehow I tend to think that google would do that better than U.S. department of transportation if you let them make money off of it.
The hard question is how to do this in a distributed fashion. I am sure it is doable, but you probably need to discover something as revolutionary as bitcoin in order to facilitate people working towards a defined goal in a distributed but coherent way in real life.