Railway vehicle and associated traffic method

A railway vehicle comprising at least one car and at least one bogie carrying the car, the bogie comprising a chassis and a secondary suspension system between the chassis and the car, the secondary suspension system, comprising:

• a jack comprising two ends extending along a same axis;
• and
• a power supply system of the jack;
• wherein the jack is fluidly connected to the power supply device (38) by at least one flow limiter, and
• wherein the jack is configured to go from a first so-called passive configuration, in which the supply device is inactive, the jack then being able to passively damp the oscillations in an elevation direction between the car and the chassis using the flow limiter, to a second so-called active configuration in which the supply device is configured to supply the jack in order to modify the distance between the car and the chassis or in order to keep the distance constant between the car and the chassis.