Main Activities of HDZI The Croatian Association of Railway Engineers (HDZI) is a professional association advocating the certification of the railway as an environmentally friendly, energy-efficient, competitive, and safe transport system. HDZI publishes the only professional magazine on railway issues in Croatia. It also provides the EURAIL-ING certificate for the railway engineering profession. Among the activities of the association is primarily researching modern technologies applied in advanced railway systems. It focuses on transferring this knowledge to railway professionals so that they can make an appropriate contribution to the development of national rail transport and industry. HDZI provides opportunities and support in their professional expression and actions, as well as in acquiring new knowledge and personal professional development. HDZI actively promotes new technologies and solutions that can contribute to the improvement of the Croatian railway system.