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Title 49: Transportation
Subtitle B: Other Regulations Relating to Transportation (Continued)
CHAPTER II: FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
PART 213: TRACK SAFETY STANDARDS
Subpart C: Track Geometry
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 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 accommodate the minimum length of runoff, part of the runoff may be on tangent track.
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