Articulated vehicle for transporting passengers, said vehicle comprising at least: - a front carriage comprising at least a steered-front axle and at least a first driven axle; - at least a rear carriage connected to said front carriage by a first articulated joint, said first rear carriage comprising at least a first operative axle, wherein said front carriage comprises a main driving system comprising a thermal engine of said vehicle which drives said first driven axle, said main driving system comprising at least a drive train operatively connected to said first driven axle and characterized in that the articulated vehicle is without any drive line passing from carriage to carriage and is modular comprising one or more rear carriages, wherein each rear carriage (20, 20') comprises a first auxiliary driving system (105, 105') for driving said first operative axle (23, 23') of said rear carriage (20, 20'), said auxiliary driving system (105, 105') comprising: - at least one electric machine (51, 52, 51', 52') operatively coupled to said first operative axle (23, 23'); - an energy storage system (106, 106') electrically connected to said electric machine (51, 52, 51', 52'), wherein, according to a first operation mode of said auxiliary driven system (105, 105'), said at least one electrical machine is operated as an electric generator to charge said energy storage system and wherein according to a second operation mode said at least one electrical machine is operated as electric motor to provide power to said first operative axle and in that said front carriage comprises a second operative driven axle and at least one electrical apparatus (91, 91') connected to said second operative driven axle to provide torque to said to provide torque to said second operative driven axle, and an energy storage system electrically connected to the electrical apparatus (91, 91'), wherein during regenerative braking mode of the vehicle, the energy storage system is charged by the electrical apparatus (91, 91') working as generator and on power/torque demand, the energy storage system provides electrical energy to the electrical apparatus. - a front carriage comprising at least a steered-front axle and at least a first driven axle; - at least a rear carriage connected to said front carriage by a first articulated joint, said first rear carriage comprising at least a first operative axle, wherein said front carriage comprises a main driving system comprising a thermal engine of said vehicle which drives said first driven axle, said main driving system comprising at least a drive train operatively connected to said first driven axle and characterized in that the articulated vehicle is without any drive line passing from carriage to carriage and is modular comprising one or more rear carriages, - at least one electric machine (51, 52, 51', 52') operatively coupled to said first operative axle (23, 23'); - an energy storage system (106, 106') electrically connected to said electric machine (51, 52, 51', 52'), wherein, according to a first operation mode of said auxiliary driven system (105, 105'), said at least one electrical machine is operated as an electric generator to charge said energy storage system and wherein according to a second operation mode said at least one electrical machine is operated as electric motor to provide power to said first operative axle and in that said front carriage comprises a second operative driven axle and at least one electrical apparatus (91, 91') connected to said second operative driven axle to provide torque to said to provide torque to said second operative driven axle,