In this thesis I analyze the traffic load and throughput of 4-way junction with traffic lights. On this basis, I propose two possible solutions to improve existing arrangement. As a first option I present the reconstruction of the intersection with modified geometry and attached left turn lane on the import of the crossing, which is problematic. My second proposal for resolving the current situation, is to place a new roundabout. In both cases, I also change the management of non-motorized road users, which under the new regulation takes place across the river over a wooden footbridge. Eligibility and suitability of each variant I prove by calculation of the degree of saturation and level of services for each way in a classic crossroads with traffic lights, and the calculation of the traffic throughput for every importing lane
