The bachelor thesis deals with designing stone mastic asphalt with modified parameters in comparison to the current applicable standard. It describes the sub-parts of the design such as tests of raw materials (aggregates and asphalt), a proposal for a modified grading curve, and mixture tests. After suggesting a satisfactory mixture, it presents the test of produced boards'resistance to permanent deformations at 50 ° C and 60 ° C. The obtained results are then evaluated and mutually compared.