49 CFR § 213.59 - Elevation of curved track; runoff.
---
identifier: "/us/cfr/t49/s213.59"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "49 CFR § 213.59 - Elevation of curved track; runoff."
title_number: 49
title_name: "Transportation"
section_number: "213.59"
section_name: "Elevation of curved track; runoff."
chapter_name: "FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
part_number: "213"
part_name: "TRACK SAFETY STANDARDS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 20102-20114 and 20142; 28 U.S.C. 2461 note; and 49 CFR 1.89."
regulatory_source: "63 FR 34029, June 22, 1998, unless otherwise noted."
cfr_part: "213"
---
# 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 accommodate the minimum length of runoff, part of the runoff may be on tangent track.
[63 FR 34029, June 22, 1998, as amended at 78 FR 16101, Mar. 13, 2013]