49 C.F.R. § 213.55 Alinement.
Title 49 - Transportation
Alinement may not deviate from uniformity more than the amount prescribed in the following table:
Title 49: Transportation
PART 213—TRACK SAFETY STANDARDS
Subpart C—Track Geometry
§ 213.55 Alinement.
---------------------------------------------------------------------------------------------------------------- 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)----------------------------------------------------------------------------------------------------------------Class 1 track.......................................... 5 \3\ N/A 5Class 2 track.......................................... 3 \3\ N/A 3Class 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\----------------------------------------------------------------------------------------------------------------\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.
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