In this final work a topic entitled "Signalization in Road Traffic" will be elaborated. The theme will be elaborated through 8 separate chapters, each of which will include one part of the area closely related to the given topic. In the first chapter, as well as in each work, an introduction will be made to the theme itself and to the issues that will be discussed in the final work. After the introductory part, in the second we will go back to history and talk about the development of traffic signalization itself. The first forms of signalization appeared with the appearance of the first steam vehicles at the beginning of the 19th century, and as vehicles evolved, signalizaton has evolved to this day. In the third chapter, we will devote on The Ordinance on Traffic Signs, Signalization and Equipment on the Road, where the main provisions and regulations related to traffic signalization will be presented. The rulebook was adopted by the Ministry of Maritime Affairs, Transport and Infrastructure of the Republic of Croatia. After the history and the rulebook, a comprehensive segmentation of traffic signalization will be made in the fourth chapter, where complete systematization of all forms of signalization that will be used daily in road traffic will be made. The fifth chapter will be closely associated with the fourth chapter, and there will be rules and regulations about how to set traffic signals on the roads. After that, in the sixth chapter we will devote to the road traffic safety, ie. the role and importance of traffic signalization in improving it. The seventh chapter will present some interesting statistical data and conducted recent analyzes of traffic signalization and traffic safety. The eighth chapter focuses attention on transport projects, where general things are said about them (basic and technical part), and at the same time some examples of road projects are mentioned (made in AutoCAD) for roads in the Republic of Croatia. In the ninth chapter, and at the same time, the final chapter, the whole work was concluded, where systematization was briefly made all the work presented and written.