I think some elements of Capitalism are necessary in a country's infrastructure: the most competitive methods for transport & supply succeed while others fail. However, Capitalism is not that 'smart', and I don't see why some people worship it above and beyond what it is.
By saying "Capitalism is not that smart," you are actually saying "
I am not that smart," since what capitalism does is determined by what YOU buy.
For example, Capitalism with insufficient government oversight may favour a road monopoly instead of diverse transport options. Why? Because roads create an endless market for consumable items called cars, which wear out pretty quickly. However, trains are considered part of the infrastructure, are built to last, and thus provide fewer opportunities for Capitalists to profit from. Are roads more efficient than trains? No, that's just propaganda.
If there is a monopoly, chances are it will charge more than trains, and people will pick trains, or even invest some other mode of travel. Monopolies never last, because when pushed hard enough, someone always comes up with alternatives.
Otherwise, if roads are cheaper and more efficient... what's the problem?