Corrugation on low rails in curved track is a common and significant problem on North American railways. Research findings on probable causes are described and practical methods of keeping this problem under control are suggested. The role of wheel and rail contact stresses in the plastic deformation of rail surface, a necessary condition for corrugation development, is examined, and the use of high-strength steel and rail profile grinding to control rail corrugation through reducing or preventing rail surface plastic deformation is discussed. Results of recent field trials of rail corrugation control using a rail profile grinding technique are presented.