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); <EOS>