Road traffic is a complex system crucial for the global economy. With the increase of both human population and number of vehicles, more and more traffic congestions are caused which thus lead to decreased efficiency of traffic infrastructure. When it comes to mobility, intelligent systems are integrated to surpass the challenges of modern society, which aim to solve existing road traffic problems. Intelligent road traffic management systems bring great benefit to society since they provide more effective systems of public, personal and commercial transport. In addition to the usual benefits, such as better safety and shorter travel time, there are more advantages that can be achieved with existing technologies. ITS solutions connect vehicles, traffic signalization, toll booths and other infrastructure to facilitate traffic, prevent accidents, reduce emissions, and make transport more effective. The paper describes intelligent transport systems in road traffic, their features and architecture. The application of intelligent transport systems on road traffic is shown through the communication of vehicles with the environment, data collection from highways, electronic toll collection and other factors that affect intelligent road traffic systems. Lastly, a proposal is suggested for the introduction of intelligent traffic system on the microlocation of Pehlin in City of Rijeka.