A vehicle consisting of a tractor and at least one trailer that is mechanically connected to the tractor in order to be dragged in motion, wherein: - the tractor comprises an engine, tractor wheels, at least one tractor brake, which may be actuated in order to brake a particular tractor wheel, a brake assembly, which is provided with a brake pedal in order to actuate the tractor brake to brake, a trailer brake master valve, which is operatively connected to the brake assembly, and an accelerator that is operatively connected to the engine; - the tractor further comprises electronic management means comprising trailer braking management means and engine management means, said management means being operatively connected to the trailer brake master valve, to the brake assembly and to the engine; - the trailer comprises trailer wheels and at least one trailer brake that may be actuated in order to brake a particular trailer wheel, wherein the trailer brake is operatively connected to the trailer brake master valve of the tractor by means of a trailer brake circuit and may be actuated when the pressure in the trailer brake circuit is equal to, or greater than a braking pressure (Pb); - wherein the management means are configured to detect an actual deceleration (a R) for the vehicle, to calculate an expected deceleration (a E) for the vehicle and a difference (Δa) between the expected deceleration and the actual deceleration (Δa = a E - a R), and to control the trailer brake master valve so as to modify the pressure in the trailer brake circuit in order to minimize said difference (Δa); characterised in that the tractor comprises a braking pressure sensor that is applied to the brake assembly in order to detect a braking pressure of the tractor and is operatively connected to the management means, and said management means are designed to calculate the expected deceleration (a E) on the basis of said braking pressure of the tractor. - the tractor comprises an engine, tractor wheels, at least one tractor brake, which may be actuated in order to brake a particular tractor wheel, a brake assembly, which is provided with a brake pedal in order to actuate the tractor brake to brake, a trailer brake master valve, which is operatively connected to the brake assembly, and an accelerator that is operatively connected to the engine; - the tractor further comprises electronic management means comprising trailer braking management means and engine management means, said management means being operatively connected to the trailer brake master valve, to the brake assembly and to the engine; - the trailer comprises trailer wheels and at least one trailer brake that may be actuated in order to brake a particular trailer wheel, wherein the trailer brake is operatively connected to the trailer brake master valve of the tractor by means of a trailer brake circuit and may be actuated when the pressure in the trailer brake circuit is equal to, or greater than a braking pressure (Pb); - wherein the management means are configured to detect an actual deceleration (a R) for the vehicle, to calculate an expected deceleration (a E) for the vehicle and a difference (Δa) between the expected deceleration and the actual deceleration (Δa = a E - a R), and to control the trailer brake master valve so as to modify the pressure in the trailer brake circuit in order to minimize said difference (Δa);