Indiana Code Title 9. Motor Vehicles § 9-21-4-6

Sec. 6. (a) A person may not place, maintain, or display an advertising sign, signal, or device on or over the roadway of a highway.

(b) A person may not place, maintain, or display an advertising sign, signal, or device on a highway in a city between the curb and sidewalk.  If the curb and sidewalk join, a person may not place, maintain, or display on the sidewalk an advertising sign, signal, or device closer than ten (10) feet from the curb line.  Overhanging signs may not overhang the curb.

(c) A person may not place, maintain, or display an advertising sign or device of any character within one hundred (100) feet of a highway outside the corporate limits of an incorporated city or town that obstructs the view of:

of a person traveling the highway for a distance of five hundred (500) feet or less from the sign or device as the person approaches the highway or intersecting highway.

(d) A person may not place, maintain, or display an advertising sign or a device of a permanent or semipermanent character on a highway right-of-way.

(e) Each sign, signal, or marking prohibited under this section is declared to be a public nuisance.  The authority having jurisdiction over the highway may remove or cause to be removed the prohibited sign, signal, or marking without notice.