We will analyze public transport of passengers in urban areas, its problems, and the problems that todays public transport faces. With the modernization of public transport it is necessary to select the system of transportation that will work with as little difficulties and limitations as possible. Public transport according to technology and the type of service can be divided into: rail, bus and paratransit. Railroad transport is the process of moving or transportation of passengers and goods by driving on rails. Suburban railway is a type of sub-system adapted to mass railway transport of passengers from the region or metropolitan areas to urban centers. Transportation with light rail is currently the most popular form of public transport and railway system that is a combination of trams, subway and urban-suburban railway. The rest is the metro rail system. Metro is extremely isolated overground-underground subsystem of public transport within the city. The most common form of transportation in Croatia as well as in the world is the bus service. The bus is powered passenger vehicle that is used for public transport of a large number of passengers by road. Transportation is performed by different types of buses, such as: a standard bus, minibus, decker bus and articulated bus. Paratransfer varies from railway and buses in that they run, if necessary, and does not follow a steady course and a steady timetable and therefore is referred to as the ride by order. Types of paratransfers are taxi, jitney and carpool.