(225 ILCS 440/6.03)
(from Ch. 121, par. 506.03)
(a) No sign may be erected or maintained in such a manner as to
obscure or otherwise physically interfere with an official traffic sign,
signal or device or to obstruct or physically interfere with the driver's
view of approaching, merging or intersecting traffic within 1000 feet of
such sign, signal, device or point of intersecting or merging traffic.
(b) Along interstate highways and expressways no two sign structures on
the same side of the highway shall be erected less than 500 feet apart.
Along primary highways other than expressways no 2 sign structures on the
same side of the highway shall be erected less than 300 feet apart (100
feet inside incorporated municipalities). Except with respect to the
repair, rebuilding, or replacement of any sign lawfully erected before
January 1, 1993, after the effective date of this amendatory Act of 1992,
along primary highways other than expressways, no 2 sign structures on the
same side of the highway shall be erected less than 500 feet apart (300
feet inside incorporated municipalities). A sign structure may have one or
two facings with a maximum of two signs per facing. Back to back, V-type,
and side by side signs shall be treated as single sign structures.
Provided, however, that the foregoing spacing between structures
requirements shall not apply to structures which are separated or screened
by buildings, natural surroundings, or other obstructions in such manner
that only one sign facing located within such distance is visible at any
(c) Outside incorporated municipalities, no sign structure may be
erected along an interstate highway or expressway adjacent to, or within
500 feet of an interchange, rest area, or weigh station, such 500 feet to
be measured along the main-traveled way from the beginning or ending of
pavement widening at the exit from or entrance to the main-traveled way.
(Source: P.A. 87-1205.)