§299.311. Track geometry; general. — Inbound Citations

(a) The maximum elevation of the outside rail of a curve may not be more than 200 mm (7-7/8 inches). The outside rail of a curve may not be lower than the inside rail by design, except when engineered to address specific track or operating conditions; the limits in § 299.311 apply in all cases.

(i) Hold gauge within limits prescribed in § 299.311;

(4) The TGMS shall be capable of measuring and processing the necessary track geometry parameters to determine compliance with §§ 299.311 and 299.315.

As used in this part—

(4) Prior to the start of the qualification testing program, a qualifying Track Geometry Measurement System (TGMS) shall be operated over the intended route within 30 calendar days prior to the start of the qualification testing program to verify compliance with the track geometry limits specified in § 299.311.