The TrafFix Devices “Big Sandy” is an Impact Attenuator Sand Barrel that is easy to move and provides external verification of the barrels correct weight of sand and is manufactured from UV stabilized high density polyethylene plastic. This Impact Attenuator/Crash Cushion Sand Barrel has been tested and certified to meet the crash worthy requirements of NCHRP 350; Big Sandy Sand Barrels go above and beyond these requirement to provide the best in highway safety.