In this master's thesis, presents the conceptual design of a slab-type overpass across the road in the plain. The overpass consists of four spans, and the total length of the overpass is 61.78 m. The span assembly rests on columns of circular cross-section, while at the ends it rests on abutments. The overpass is designed of reinforced concrete and will be constructed by monolithic construction. The master's thesis contains a detailed technical description in which the characteristics of the designed overpass are described. Attached are the disposition drawings of the overpass: view, longitudinal section, floor plans of the upper and lower structure and two cross-sections. A static calculation for the span assembly was performed. It is a continuous girder of slab-type cross section, which is three times statically indeterminate (seen as a rod continuous girder with four spans). Due to static uncertainty, the calculation of internal forces was performed on a planar system with the GRAFeM (Kovač & Presečki) software package. The sizing of the girder is carried out for the most critical cross section, in which the largest internal forces act. Based on the obtained required reinforcement surface, the girder is reinforced with reinforcement bars to meet the load-bearing capacity of the span assembly. Attached to the paper, drawings of reinforcement are given. At the end of the thesis, a proof of the measures for the overpass and the cost estimate of the works to be performed was made.