"Human simulation" has been one of the major keywords in recent human science studies. This paper reviews human simulation methods applied to railway ergonomics. One type of simulator uses virtual reality technology to simulate an environment, such as Driving Simulators, Ride Comfort Simulators and Railway Station Simulators. Another type uses computer simulations to deal with topics such as (i) evaluating the mental workload experienced by train drivers and (ii) motion patterns of passengers and injuries caused by train collisions.