Abstract: An automatic road marking system including a pilot vehicle provided with a first GPS module, cameras, a tank and a control unit with wireless transmitter and an automatic guided vehicle (AGV). The AGV has a motor and a steering system, a second GPS module, spray nozzles, a hydraulic circuit, and an electronic control unit (ECU) with a receiver coupled with the transmitter of the control unit of the pilot vehicle. The system also includes a third GPS module suitable for being disposed in a fixed position in the proximity of the carriageway or on the carriage way where the road markings are to be made.