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In the current research, a semiactive suspension system is presented as a railway vehicle to investigate the rail track–vehicle interaction using magnetorheological dampers. For this purpose, a dynamic model of a railway vehicle is introduced, based on the integrated magnetorheological dampers, to reduce the vertical interaction of the rail track and the vehicle system. The model includes a railway vehicle with 10 degrees of freedom and the track with six coupled subsystems via the nonlinear Hertz contact mechanism. To verify the proposed model, a test data which is reported in the literature is used, and then the rail track–vehicle interaction of the semiactive system is compared with the passive system. The results show that the semiactive system could significantly reduce the interaction.