EN17282:2020isaEuropeanstandardthatspecifiesrequirementsforsub-ballastmaterialsusedinrailwayinfrastructure.Itcoverstheproperties,testingmethods,andperformancecriteriaformaterialsplacedbeneaththeballastlayertoprovidestability,drainage,andsupportforthetrackstructure.Thestandardensuresthatsub-ballastmaterialscontributetothedurability,safety,andefficiencyofrailwayoperationsbydefiningqualityandconsistencybenchmarks.