The feasibility of extracting energy from the wake of moving vehicles on highways could be considered as a significant topic among researchers. Wind turbines can harvest this energy, which is often unused, from moving vehicles in an urban context. The aim of this research is to investigate a straight three-bladed Darrieus wind turbine performance on highways using CFD method. The study is validated against experimental data. Moreover, SST turbulence model has been used to simulate the turbulence flow regime. In order to evaluate the performance of Darrieus in various traffic scenarios on highways, three different cases are conducted. First, one vehicle on a one-way lane highway is modeled. In the second case, two adverse vehicles on a two-way lane highway are modeled and in the third case, two vehicles on a one-way lane highway are simulated. The third Case demonstrates a more realistic situation comparing to the first one and the highest value of the power coefficient is belongs to the third case. For case3 maximum value of the power coefficient when it is normalized by what is 0.007706 and the corresponding power produced by the rotor is 159.310 W while these values are 0.004767, and 98.558 for the first case.

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