In this century, the importance of energy has heightened due to the depletion of natural resources and the environmental impact caused using fossil fuels. The pressing need for alternative energy sources to replace natural gas and oil has become clear. The transition to green energy systems, which rely on renewable sources like sunlight, wind, hydro, and geothermal energy, has become a crucial initiative. These systems offer long-term energy solutions while reducing harmful environmental effects. This master's thesis aims to characterize the unbound material used in constructing internal roads capable of accommodating heavy vehicles during the construction of renewable energy plants. The study utilizes both empirical and mechanistic-empirical approaches.