92 Ill. Adm. Code 1535.335
Location of Signals
Section 1535
Section 1535.335 Location of
Signals
a) For two directional traffic, one signal is to be located upon
each side of the track or groups of tracks except that, where local conditions
so require, a greater number of signals or flashing light units may be
employed. The signals shall be placed on the right hand side of the highway as
viewed by a traveler approaching the crossing unless local conditions require
different arrangement. The distance from the signals to the railroad and to
the edge of the pavement will be governed by local conditions, but in general
the signals shall be located not more than 15 feet from the near rail except
where a point in the centerline of the highway opposite the signal would be
less than 10 feet therefrom. In general, the signals shall be located not less
than 8½ feet from the nearest rail. The distance from the signals to the edge
of pavement shall not be less than 6 feet or more than 12 feet except when the
pavement has curb and guttering, then the signals may be located 4 feet 1 inch
but not less from the face of curb. These distances are to the center of the
mast.
b) On multilane highways extending on either side of a median
strip at least 8 feet 2 inches in width one additional flashing unit as shown
in Figure 5 (Appendix B, Illustration E) shall be placed on each side of track
or group of tracks, in such a manner as to provide appropriate warning to
vehicles approaching crossing in traffic lane on left side of pavement. Back
lights shall not be required.
c) Unless otherwise ordered by the Commission, on highways four
or more lanes in width with no additional flashing units as set forth in
Section 1535.335(b), supplemental sets of flashing light signals shall be
mounted on appropriate cantilever arms (Figure 6 (Appendix B, Illustration F))
in such a manner as to provide appropriate warning to vehicles using the outer
lanes. Back lights shall also be required.
d) Where conditions require, special signals such as side lights,
illuminated "no left turn" and "no right turn" signs may
be installed.