In terms of damage to roads and associated facilities, the greatest danger is threatened bythe appearance of landslides. If the terrain zones prone to landsliding are known, they should be avoided at the design stage of the roadway, because the landslide remediation is usually very expensive. In addition, quiteoften after the rehabilitation measures are taken, the landslide can be reactivated, and there is a need for many landslides to be repaired repeatedly. The paper presents the basic elements of the landslide with corresponding labels, names, and terms. The methodology of studying the landslidesis also presented consideringthe design of cutting and embankmentslopesof roads. It is also briefly explained the phenomenon of liquefaction, which is one of the most common causes of damage to roads due to seismic effects. In addition,the principles of landslideremediation measuresare pointed out, with special emphasisto the measureof redistribution of earth's masses. Lastly,a map of Serbia with an overview of significant areas of instability(landslides, slopes,and scree) is also presented

This paper presents the dynamic analysis of prestressed reinforced concrete road bridge "Goce Delchev" over the river Vardar in Skopje from the aspect of dynamic stability. The bridge span is 88,00m with overhangs2x29,20m, founded on wells (caissons) whereby the height of the upper edge of the well to the upper edge of the bridge is 14,37m. The longitudinal slope of the bridge is in the gentle slope of 0.57%. Experimental testing on theforced vibrations of the bridge was performed, and then a mathematical model was formed and dynamic analysiswas made. This was necessary, because the superstructure of the bridge is complex cross-section and behaves differently in the longitudinal and transverse direction and the effect of different soil-structure interaction. From all of the above it can be seen that the obtained corresponding influences mutually greatly match.

The paper gives a theoretical basis and terms for calculation of static and dynamic impact of girders with semi-rigid connections of members in joints. In the existing literature calculation of line systems in which the connections of members in joints are absolutely rigid or ideally pinned has been elaborated in detail. In real structures in general, and particularly in the precast ones, connections may be partially rigid, which can have a significant impact on the change of stresses and strains in the construction. In the world there are several procedures with different approaches to the calculation of structures with semi-rigid connections, but it was proven that all of them lead to the same results. All of these approaches give experimental analysis of the results in addition to theoretical one