4. Conclusions and future workWhen a train travels on a bridge at a high speed, the traininduced wind and the cross wind are combined to forma complicated interaction, which has a crucial impacton the flow around train-bridge system. In this study,the aerodynamic characteristics associated with the trainand bridge with a crosswind are investigated using a newoverset mesh technique and it is found that the numericalcalculations in comparison with the previous wind tunneltest are reliable. Furthermore, a fitting formula for a variety of yaw angles is developed to predict the aerodynamicforces. The main conclusions are drawn as follows: