The chapter aims to investigate the undertakings of Serbia within infrastructure projects to accelerate the building of institutional capacities for the implementation of innovative policies and achieve a global reputation for sustainable development and greener economic growth. The analysis of public policy activities for the financing of infrastructure projects in Serbia in combination with international programs with the support of international organizations is important in helping the application of the private public partnership. Serbia is located on external capital markets to modernize various sectors related to the priorities of economic sustainable development linking them in economic and regional terms. The purpose of the chapter is to focus special attention on infrastructure projects in Western Balkans as priorities of economic sustainable development with financing of the countries in its composition in public and international policy.