Long-term quality and balanced transport policy, aimed at financing the construction and maintenance of transport infrastructure, the existence of guidelines for its implementation and understanding the value of the potential we have, are one of the foundations for future development of the entire economic system of Croatia and the European Union. Infrastructure investments that are poorly planned or not planned create developed and underdeveloped regions that, in addition to traffic isolation, struggle with economic and demographic problems, which are closely related to infrastructure issues. Quality and well planned infrastructure investments balance economic development, specifically affect the development of transport that directly affects the development of the economy through the exchange of goods during the business process, reduce transport costs and increase productivity which ultimately affects the growth of living standards. The final work analyzes the current traffic development and the current state of traffic in the Republic of Croatia with emphasis on the large infrastructure project for the construction of the Peljesac Bridge, together with other road infrastructure, which is marked as one of the priority development projects of Dubrovnik - neretva county with the European Union. Throught the final work will be defined existing and future economic and strategic determinants that should ensure efficient and sustainable management of existing resources and the economic position of Croatia in the European Union.