Croatia is a republic and a parliamentary liberal democracy and covers 56,594 square kilometres (21,851 square miles), and has a population of nearly 3.9 million. Sustainable Urban Mobility Plans (SUMPs) in Croatia are not legally defined, there are no national guidelines for their preparation and they are not connected to national funding sources. Although objectives of sustainability and political support for SUMPs exist, public participation and technical possibilities for the preparation of SUMPs are limited.