In this Master’s thesis, a conceptual project was designed for the junction of county roads ŽC 5103 and ŽC 5081 in Labin, involving the construction of a ring road. This thesis aims to make a project of a road together with two at-grade intersections to improve the traffic infrastructure, reduce traffic congestion, and ensure faster and safer connections within the region. The methodology includes an analysis of the existing construction and traffic situation and the application of road and intersection design principles using the Plateia software tool. The use of Plateia significantly accelerated and improved the precision of the design process, which would have been more time-consuming using traditional design methods without specialized software. All road elements are designed in accordance with the Croatian regulation (Pravilnika o osnovnim uvjetima kojima javne ceste izvan naselja i njihovi elementi moraju udovoljavati sa stajališta sigurnosti prometa.). The road is designed for average annual daily traffic, considering long-term needs over a 20-year period. It is classified as a second-class road, which categorizes it as a state road with a 70 km/h design speed. The axis of the road is maximally adapted to the terrain configuration, considering the specific spatial conditions. Overtaking sight distance control and stopping sight distance control in horizontal curves were conducted. All roundabout elements comply with the Croatian Guidelines for Roundabout design on State Roads (Smjernica za projektiranje kružnih raskrižja na državnim cestama). Both at-grade intersections were designed as roundabouts, a three-way, and a four-way medium-sized roundabout. Passage control was conducted for the relevant vehicle - a track with a semi-trailer. The project results indicate that constructing the ring road will reduce traffic congestion, shorten travel time, and increase traffic safety. The importance of this road and intersection construction for improving transport infrastructure and tourism in the region is highlighted.