{"data":{"id":"us/49-cfr-213.65","jurisdiction":"us","citation":"49 CFR 213.65","heading":"Combined track alinement and surface deviations.","body":"On any curved track where operations are conducted at a qualified cant deficiency, Eu, greater than 5 inches, the combination of alinement and surface deviations for the same chord length on the outside rail in the curve, as measured by a TGMS, shall comply with the following formula:\nWhere—\nAm = measured alinement deviation from uniformity (outward is positive, inward is negative).\nAL = allowable alinement limit as per § 213.55(b) (always positive) for the class of track.\nSm = measured profile deviation from uniformity (down is positive, up is negative).\nSL = allowable profile limit as per § 213.63(b) (always positive) for the class of track.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 213—TRACK SAFETY STANDARDS","Subpart C—Track Geometry"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"ff0364acfbe0cd9a77538c96031bc7f726ca3b4923f3f5d848df869af2b03a4f","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-213.63","next":"us/49-cfr-213.101"},"notice":"GroundRules: Original legal text. Not legal advice."}