Public-Private-Partnership (PPP) is a valuable and perspective instrument to enable infrastructure investments. They require cost efficient approaches, reliable fee collection structures with sufficient revenues and an effective and cooperative institutional set-up at the public side. If those conditions are not ensured the private sector will consider the shortcoming as project risks, what is reflected in the price offers. In this regard poor areas with very little existing infrastructure and corresponding large investment demands do not provide favourable conditions for private investors. Those cases still require assistance by donors or central government.