The master's thesis presents two preliminary variants of the DC-414 road reconstruction design, section between Potomje and Postup in the Pelješac peninsula in Dubrovnik-Neretva Region. Designed road variants are generally aligned to the existing road in accordance with the current Croatian Regulation (NN 110/01) for design speeds of 40 to 80 km/h. The length of the road reconstruction design is 9832.256 m in the first variant and 10523.153 m in the second variant. The horizontal alignment of the designed road in the first variant consists of 9 straight lines and 29 curves with a radius of 80 to 650 m, while in the second variant it consists of 11 straight lines and 34 curves with a radius of 45 to 650 m. The vertical alignment of the designed road in the first variant having a maximum longitudinal grade of 8.24% and a minimum of 0.5%, while in the second variant has a maximum longitudinal grade of 8.13% and minimum 0.5%. In both variants, the width of the traffic lane is 3.0 m and the width of the paved shoulder lane is 0.3 m. Stopping sight distance was tested on both variants of designed road. It turned out that on both variants, in some parts, sight distance requirements did not meet and that the side slope had to be widened. As part of the project assignment, preliminary designs of road intersections (two three-leg and two four-leg) were made at the intersections of the designed road and the existing road network.