b'COVER STORYContractors are able to fine-tune their milling depths according to variances on the road, resulting in a smoother base with a corrected cross slope.SMOOTH INNOVATIONSAS 3D MILLING TESTING CONTINUES, THE NEW TECHNOLOGY IS STARTING TO MAKE ITS MARK ON ONTARIO ROADSBy MATTHEW BRADFORDR OTO-MILL INC. is bringing milling innovations to theTheconceptof3Dmilling,especiallythenewest3D highways of Ontario. This year, the Orangeville-baseddifferentialmillingtechniques(akacorrectivemilling), firm collaborated with the Ministry of Transportationholdssignificantpotentialfortheindustry.Theprocess (MTO),techtrailblazersandroadbuildingpartnerstocombines3Dscanningtechnologyandgroundcontrol test drive 3D Profile Milling technology on major routespointstoproducea3Ddifferentialmillingcontrolplan throughout the province. that contractors can use to fine-tune their milling depths accordingtovariancesalongtheroad.Asdemonstrated in several of ROTO-MILLs pilot projects, the result is a smootherbasewithacorrectedcrossslopeforsurface asphalt.Essentially, this milling model reduces milling depth in areas of the road that are already a low point in the model, such as ruts or potholes, and increases milling in higher points of the road, which reduces the overall height variation along the milling surface, explains Josh Guest, Manager of Innovation & Fleet Operations with ROTO-MILL. This provides a superb base profile upon which new or recycled asphalt can be laid. This improves the overall ride quality of the road while extending the service life of the new road as a result of the optimized base profile.The process of 3D milling requires fewer surveyors than traditional means. A truck equipped with the 3D scanner ROTO-MILL Executive Chairman Ted Arscott, right, showing a Digital Grade Sheet at a trade show.'