Railway vehicle comprising at least one body and at least one bogie carrying the body, the or each bogie comprising: - a chassis; - two pairs of wheels connected by an axle, each axle being rotatably mounted on a pair of axle boxes; - a primary suspension system associated with each axle box and arranged between the chassis and said axle box; - at least two secondary suspension systems each arranged between the chassis and the body, including a first secondary suspension system and a second secondary suspension system; - a first adjusting member associated with said first secondary suspension system and capable of modifying the restoring force of said first secondary suspension system as a function of the distance to the body from a first reference point; - a second adjusting member associated with said second secondary suspension system and capable of modifying the restoring force of said second secondary suspension system as a function of the distance to the body from a second reference point; - a first control system for the first adjusting member, capable of influencing the position of the first reference point relative to the body as a function of the deflection of the first secondary suspension system and of the deflection of a respective primary suspension system constituted by a first primary suspension system; - a second control system for the second adjusting member, capable of influencing the position of the second reference point relative to the body as a function of the deflection of the second secondary suspension system and of the deflection of a respective primary suspension system constituted by a second primary suspension system; each control system comprising: - a measuring member capable of measuring the deflection of the respective primary suspension system; and - an actuator fixed to the chassis and capable of adjusting the distance from the reference point to the chassis, said actuator being enslaved to the measuring member so that the distance from the reference point to the chassis is a function of the deflection of said respective primary suspension system, characterised in that the measuring member and the actuator each comprise a hydraulic jack comprising a hydraulic pipe communicating with the two hydraulic jacks. - a chassis; - two pairs of wheels connected by an axle, each axle being rotatably mounted on a pair of axle boxes; - a primary suspension system associated with each axle box and arranged between the chassis and said axle box; - at least two secondary suspension systems each arranged between the chassis and the body, including a first secondary suspension system and a second secondary suspension system; - a first adjusting member associated with said first secondary suspension system and capable of modifying the restoring force of said first secondary suspension system as a function of the distance to the body from a first reference point; - a second adjusting member associated with said second secondary suspension system and capable of modifying the restoring force of said second secondary suspension system as a function of the distance to the body from a second reference point; - a first control system for the first adjusting member, capable of influencing the position of the first reference point relative to the body as a function of the deflection of the first secondary suspension system and of the deflection of a respective primary suspension system constituted by a first primary suspension system; - a second control system for the second adjusting member, capable of influencing the position of the second reference point relative to the body as a function of the deflection of the second secondary suspension system and of the deflection of a respective primary suspension system constituted by a second primary suspension system; - a measuring member capable of measuring the deflection of the respective primary suspension system; and - an actuator fixed to the chassis and capable of adjusting the distance from the reference point to the chassis, said actuator being enslaved to the measuring member so that the distance from the reference point to the chassis is a function of the deflection of said respective primary suspension system, characterised in that the measuring member and the actuator each comprise a hydraulic jack comprising a hydraulic pipe communicating with the two hydraulic jacks.