[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR213.59]

[Page 100]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 213_TRACK SAFETY STANDARDS--Table of Contents
 
                        Subpart C_Track Geometry
 
Sec. 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 Sec. 213.57(b).
    (b) Elevation runoff shall be at a uniform rate, within the limits 
of track surface deviation prescribed in Sec. 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.