This thesis deals with the possible variants of the reconstruction of the signalised intersection in Sežana. We have done a comparative analysis of the three possible variants of the intersection reconstruction. Studies include the feasibility analysis, capacity analysis, safety analysis and the economic analysis for the three possible variants. The proposed solution is a construction of a roundabout at the conceptual level, in accordance with the technical specifications for public roads. Data were obtained on automatic and manual traffic count, traffic light control program, car accidents and surveying plan.