Financing of sub-regional infrastructure projects faces far more complex challenges than national projects. Apart from the usual challenges associated with financing large infrastructure projects(e.g., long implementation per sovereign risks), the development of regional investments also require the support of, and coordination between, two or more countries, which makes the process more complicated. Private sector finance is also important for the middle income countries of IMT-GT BIMP-EAGA. A critical factor affecting the attraction of private sector finance for sub-regional projects is the lack of adequate project preparation which could deter public-private partnerships(PPPs). The lack of adequate and reliable technical and financial on PPP projects can hamper the evaluation of risks, not only from the point of view of the private sector entity, but from the point of view of the public sector. A sub-regional project development facility is hence seen as crucial in providing resources for the preparation of pre-feasibility and feasibility studies