Method and device for milling the surface of a traffic area in at least two layers

A method of milling a surface of a traffic area in at least two layers, characterized in that

• a first layer is milled and at the same time a spatial position (X, Y, Z) of a road milling machine and a cross slope of a milling drum are measured continuously at each moment of milling the first layer and the measured data are stored in a database connected to a 3D guidance computer,
• from the stored measured data representing the spatial positions (X, Y, Z) of the road milling machine and the cross slopes of the milling drum, a digital 3D model of the surface of the traffic area after milling the first layer is calculated in a 3D guidance computer for calculation of 3D models of surface of traffic area selected from the group comprising of the 3D guidance computer and a server connected to the 3D guidance computer and a server integrated in one device with the 3D guidance computer,
• subsequently, at least a second layer is milled after the first layer is milled using the digital 3D model of the surface of the traffic area after milling the first layer and the obtained digital 3D model of the desired target surface of the traffic area after the milling part of the repair or obtained a digital differential model of milling depths,
• before milling the second layer, the calculated digital 3D model of the surface of the traffic area after milling the first layer is sent to the server, and the server calculates a digital 3D model of the desired target surface of the traffic area after milling part of the repair from the calculated digital 3D model of the surface of the traffic area after milling the first layer and from additional design information.