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This paper first describes the prototype operator aiding system called MACC, developed and realized by the " Road Test Center " in cooperation with the " Public Works Research institute ". This on-board system displays a real-time two-dimensional colored cartography of the compaction pattern of the work site to inform the compactor operator about the level of energy already spent on the considered compaction area. The system can additionally provide the deferred data recorded for the control of the quality. Some results , achieved in actual field conditions, are then presented and the major developments of the system to contemplate in order to manufacture a standard device are finally discussed.