49 CFR Part 213
§ 213.329 — Curves; elevation and speed limitations
FRA Part 213 · Subpart G — Train Operations at Track Classes 6 and Higher. Full current text with cross-references on BuildSpec.
§ 213.329 Curves; elevation and speed limitations. (a) The maximum elevation of the outside rail of a curve may not be more than 7 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 § 213.331 apply in all cases. (b) The maximum allowable posted timetable operating speed for each curve is determined by the following formula: Where— Vmax = Maximum allowable posted timetable operating speed (m.p.h.). Ea = Actual elevation of the outside rail (inches). 6 6 Actual elevation,…
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