A high level of ecological and sometimes technical risks during the building time. The environmental and technical review processes can raise project costs and cause significant project delays;
•a high level of capital expenditure. Usually highway infrastructure projects require a high initial investment. Full return of the investments is expected only after a long period of time;
•a long technical life time of the facility which needs major maintenance. It needs great costs and these costs are difficult to estimate because they are expected far ahead;
•an optimal social rate rarely provides the maximum level of income taking into account necessary costs ;
•the difficulty of cost recovery from the number of users;
•the object cannot be passed on the security for crediting;
•the depreciation period is likely to be significantly longer than the loan maturity period which, for indirect reasons, sometimes prevents cash flow after debt service being distributed in full to the shareholders;
•the project generates income after a period of time. The initial traffic revenue is unlikely to match the financing requirements during the first time of implementation of the project.