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One of the most important properties of bitumen is - among others ? its ability to stress relaxation. This ability affects the energy absorption from the vehicles? wheels by asphalt pavement. It has also influence on deformation, damages and durability of road surface. The problem of the destruction of asphalt layers is common and current. In order to determine the physicomechanical characteristic of bitumen, in the article, a method of evaluation of stress relaxation properties in road bitumens is presented. In t...