I'm waiting. And no doubt will be when Doomsday comes.
LOL!!! I've been waiting for YOU to cite one major mode of our transportation infrastructure that HASN'T benefitted from some form of government assistance.
You CAN'T.
From the original postal roads to the early canals and system of locks and dams that make our rivers navigable, the original development of the railways, the old U.S. Highway system, all our major airports and air-traffic control system (heck, even jet engines were originally developed for the military), the Interstate Highway System, bridges, tunnels, etc. etc.
Your persistant insistance that mass-transportation must be purely financed by the private sector is unrealistic and adolescent. Government has a legitimate role in the development of such infrastructure. And if local government chooses to subsidize mass-transit, which is often the case, I have no problem with that either. Good transportation infrastructure facilitates economic activity and benefits everbody.
Furthermore, as a conservative, I also advocate participation of the private sector in the development and operation of such systems. NOBODY wants to see their tax dollars disappear into an ineffective government bureacracy, so "privatization" should be employed as much as possible.
However, as stated before, your idealistic 'private sector only' mantra is impractical, unrealistic and juvenile.