[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR213.55]

[Page 98]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 213--TRACK SAFETY STANDARDS--Table of Contents
 
                        Subpart C--Track Geometry
 
Sec. 213.55  Alinement.

    Alinement may not deviate from uniformity more than the amount 
prescribed in the following table:

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                                                           Tangent track                Curved track
                                                        --------------------------------------------------------
                                                          The deviation of   The deviation of   The deviation of
                                                           the mid-offset    the mid-ordinate   the mid-ordinate
                     Class of track                        from a 62-foot     from a 31-foot     from a 62-foot
                                                          line \1\ may not  chord \2\ may not  chord \2\ may not
                                                           be more than--     be more than--     be more than--
                                                              (inches)           (inches)           (inches)
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Class 1 track..........................................                  5            \3\ N/A                  5
Class 2 track..........................................                  3            \3\ N/A                  3
Class 3 track..........................................             1\3/4\             1\1/4\             1\3/4\
Class 4 track..........................................             1\1/2\                  1             1\1/2\
Class 5 track..........................................              \3/4\              \1/2\              \5/8\
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\1\ The ends of the line shall be at points on the gage side of the line rail, five-eighths of an inch below the
  top of the railhead. Either rail may be used as the line rail, however, the same rail shall be used for the
  full length of that tangential segment of track.
\2\ The ends of the chord shall be at points on the gage side of the outer rail, five-eighths of an inch below
  the top of the railhead.
\3\ N/A--Not Applicable.