A hydraulically servocontrolled transmission for a road vehicle provided with an internal combustion engine; the servocontrolled transmission displays: a servocontrolled mechanical gearbox operated by at least one first hydraulic actuator; a servocontrolled clutch operated by at least one second hydraulic actuator; a hydraulic circuit comprising a hydraulic accumulator, which contains pressurised control fluid which is used by the hydraulic actuators, and a pump, which is directly operated by the internal combustion engine to supply pressurised control fluid to the hydraulic accumulator; a park-lock device operatable to block the rotation of the driving wheels; and a control unit, which, when the internal combustion engine is turned off, uses the remaining pressure of the control fluid within the hydraulic accumulator to bring the servocontrolled mechanical gearbox in a neutral position.