Authority: IC 8-23-2-6; IC 8-23-20-25

Affected: IC 8-23-20

Sec. 17. (a) All signs erected after October 4, 1971, in adjacent areas must conform to the following criteria:

1. (1) On the interstate system and limited access facilities on the control routes:

   1. (A) no sign shall be located within five hundred (500) feet of another sign on the same side of the highway; and
   2. (B) outside incorporated municipalities, no sign shall be located within five hundred (500) feet of the nearest edge of an interchange, intersection at grade, or rest area, with the five hundred (500) feet to be measured along the interstate system or other limited access control route from the closer of the beginning or ending of pavement widening at the exit from or entrance to the main-traveled way.

2. (2) On control routes other than those in subdivision (1):

   1. (A) outside of incorporated municipalities, no sign shall be located within three hundred (300) feet of another sign on the same side of the highway; and
   2. (B) inside incorporated municipalities, no sign shall be located within one hundred (100) feet of another sign on the same side of the highway.

(b) Subsection (a)(2) shall not apply to signs separated by a building or other obstruction in such a manner that only one (1) sign is visible from any point on the control route at any one (1) time.

(c) Directional and other official signs and notices and other signs defined in IC 8-23-20-25(c) shall not be counted, nor shall measurements be made from them, for purposes of determining compliance with spacing requirements in this rule.

(d) The minimum distance between signs shall be measured along the nearest edge of the pavement between points directly opposite the signs along each side of the highway.

(Indiana Department of Transportation; 105 IAC 7-4-17; filed Jul 24, 2019, 8:08 a.m.: 20190821-IR-105170337FRA; readopted filed Oct 21, 2025, 3:46 p.m.: 20251112-IR-105240645RFA)