Abstract: A simulation system, device, and method for testing a train management system on a road-rail vehicle is provided. The simulation system includes: a brake pressure simulation device adapted to be connected to a first input of the train management computer, the brake pressure simulation device including at least one circuit configured to output signals representative of at least one brake pipe pressure; and a speed simulation device adapted to be connected to a second input of the train management computer, the speed simulation device configured to detect a speed of the road-rail vehicle and output signals representative of the speed. Also disclosed is a simulation system wherein the at least one circuit of the brake pressure simulation device is configured to have variable resistances.