In conditions of a large construction of the urban transport network, the reconstruction of network segments and intersections according to the needs of transport users are the most common construction tasks on the transport infrastructure. Assessment of whether various reconstruction solutions meet the project goals is done in the project phase, using microsimulation traffic modeling. In the settlement of Josipovac, not far from city Osijek, there is a three-way intersection that is planned to be reconstructed into a one-lane roundabout. A field traffic count was carried out, and based on the distribution of the traffic load, two more variants of the same intersection were made. Using AutoCAD, foundations were designed for existing and selected reconstruction solutions, all three of which are variations of a one-lane roundabouts. In the computer program Vissim, analyses were made of intersection solutions for the existing traffic load and an increase in traffic of 100% and 200% for all traffic flows. By analysing the results of microsimulation for selected indicators, which include the lenght of vehicle lines, waiting times, the amount of exhaust gases, fuel consumption, etc., graphic representations, various solutions for the reconstruction of the intersection were analysed and evaluated. A summary presentation of all results was made in a table in order to clearly see the differences between the analysed intersection solutions, and based on the obtained results, a rankin gof the variant intersection solutions was made.