a compaction roller particularly useful for vibration compaction of the shoulder area of roadways . the compactor is designed as an attachment for side - mounting to self - propelled or motorized machinery . the compaction roller contains : a front section comprising a frame connected to a front cylindrical roller ; a rear section comprising a frame connected to a rear cylindrical roller ; a joining means pivotally connecting said front and rear sections ; and a means for attaching to a self - propelled machinery in a side - mounted fashion . the pivoting compactor allows for simultaneous pinching and compacting on two different planes and reduces the hazards of operating a road roller compactor directly on a sloped surface .