Ballast regulator is used to distribute and shape the gravel underneath rail ties and tracks. Hydraulic cylinders on this track mounted machine control a middle and two side blades that can push the gravel evenly to give the proper shape for an even track run to be laid. These machines often run over existing tracks to ensure track ballast (gravel) supports the tracks properly. The need for hydraulic cylinders that can change the depth of the blade, as well as it’s angle on each side is crucial for keeping the track level and within tolerances for straight or curved track runs.