A road vehicle comprising: a passenger compartment in which a transmission tunnel is present, a right rear seat and a left rear seat; and an air conditioning system of the passenger compartment; the air conditioning system comprises: a rear body that is arranged in the centre of the passenger compartment in the area of the transmission tunnel and in front of the rear seats; two air vents that are obtained in the rear body; an air treatment unit connected to the two air vents in order to supply treated air to the two air vents; one single common supply duct, which originates from the air treatment unit; and a bifurcation, which connects the common supply duct to the two air vents; the road vehicle is characterized in that: the two air vents are arranged side by side one on the right side of the passenger compartment and the other on the left side of the passenger compartment, and are directed one towards the right rear seat and the other towards the left rear seat; the bifurcation has a right branch, which ends in a right air vent, and a left branch, which ends in a left air vent; the air conditioning system further comprises a blade, which is arranged in the area of the bifurcation and is movable between a completely closed position of the right branch of the bifurcation and a completely closed position of the left branch of the bifurcation; and the air conditioning system further comprises an electric actuator configured to move the blade between the completely closed position of the right branch and the completely closed position of the left branch. a rear body that is arranged in the centre of the passenger compartment in the area of the transmission tunnel and in front of the rear seats; two air vents that are obtained in the rear body; an air treatment unit connected to the two air vents in order to supply treated air to the two air vents; one single common supply duct, which originates from the air treatment unit; and a bifurcation, which connects the common supply duct to the two air vents; the road vehicle is characterized in that: the two air vents are arranged side by side one on the right side of the passenger compartment and the other on the left side of the passenger compartment, and are directed one towards the right rear seat and the other towards the left rear seat; the bifurcation has a right branch, which ends in a right air vent, and a left branch, which ends in a left air vent; the air conditioning system further comprises a blade, which is arranged in the area of the bifurcation and is movable between a completely closed position of the right branch of the bifurcation and a completely closed position of the left branch of the bifurcation; and the air conditioning system further comprises an electric actuator configured to move the blade between the completely closed position of the right branch and the completely closed position of the left branch. the two air vents are arranged side by side one on the right side of the passenger compartment and the other on the left side of the passenger compartment, and are directed one towards the right rear seat and the other towards the left rear seat; the bifurcation has a right branch, which ends in a right air vent, and a left branch, which ends in a left air vent; the air conditioning system further comprises a blade, which is arranged in the area of the bifurcation and is movable between a completely closed position of the right branch of the bifurcation and a completely closed position of the left branch of the bifurcation; and the air conditioning system further comprises an electric actuator configured to move the blade between the completely closed position of the right branch and the completely closed position of the left branch.