49 CFR Part 213
§ 213.59 — Elevation of curved track; runoff
FRA Part 213 · Subpart C — Track Geometry. Full current text with cross-references on BuildSpec.
§ 213.59 Elevation of curved track; runoff. (a) If a curve is elevated, the full elevation shall be provided throughout the curve, unless physical conditions do not permit. If elevation runoff occurs in a curve, the actual minimum elevation shall be used in computing the maximum allowable posted timetable operating speed for that curve under § 213.57(b). (b) Elevation runoff shall be at a uniform rate, within the limits of track surface deviation prescribed in § 213.63, and it shall extend at least the full length of the spirals. If physical conditions do not permit a spiral long enough to…
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