Preventive vs corrective grinding
Research by Transportation Technology Center Inc (TTCI) shows that preventive grinding is important in managing and treating rail gauge corner shelling while corrective grinding is effective in treating the rail surface condition to allow high confidence ultrasonic testing results. Ulrich Spangenberg, Scott Cummings, Ananyo Banerjee, Yuqing Zeng, and Joseph LoPresti (retired) with TTCI explain.