92 Ill. Adm. Code 1500.140
Subsidiary Freight Tracks
Section 1500
Section 1500.140 Subsidiary
Freight Tracks
a) Except as to ladder tracks the distance between the centerlines
of any two subsidiary freight tracks shall be not less than 13½ feet.
b) Team Tracks. Any two adjacent tracks, commonly known as a
pair of team tracks, with a driveway on one side thereof, may have track
centers less than 13½ feet. If a third track is constructed adjacent to such
pair of tracks its track center must be not less than 13½ feet from the centerline
of the nearest track.
c) Track System with High Platform Adjacent Thereto. Any system
of three or more tracks at freight houses, warehouses, wharves, or similar
structures, used exclusively for handling freight to or from high platforms
located on one or both sides thereof may have its track centers less than 13½
feet, provided that at least two tracks in any such system shall have centers
not less than this distance. Where such system is composed of two tracks only,
their centerlines shall not be less than 13½ feet.