ILLEGAL SIGN
A sign or billboard unlawfully erected or maintained. Expeditious removal of illegal signs without compensation is supported by the OAAA and related industry trade associations.

ILLUMINATED
Advertising displays with electrical equipment installed for illumination of the message at night, or in early morning darkness.

Impression
Is a term used by all media to quantify the number of people who have an opportunity to see an ad in a given period of time.

IMPRINTS
Name of the plant operator affixed to the bottom portion of the structure molding.

IMPRINTS - DEALER
Strip imprinted with the name, address and/or phone number of the local dealer handling the product/service being advertised. Commonly placed across the bottom 20" of poster panels.

INFLATABLE
Gas-filled, three-dimensional displays for use at point-of-sale or special events; usually taking the shape of a product, trademarked character, etc. affixed to bulletins.

INSIDE PANEL
All panels erected in a group at one location that face the same direction, are classified as inside panels, except for the one closest to the traffic. (End Panel)

INSPECTION
physical ride of advertising displays for pre-buy selection, to verify copy delivery, or for other contracted values.

INTENSITY
Many Out-of-Home media are sold at different intensity levels of advertising weight, determined by he plant operator. The client/agency determines the most efficient way to buy the market at certain advertising weights.
Common GRP/Showing sizes are # 25, #50, #75 and #100.

INTERACTIVE MARKET SYSTEM "IMS"
Interactive Market System. The largest international supplier of media and marketing systems. IMS provides advertising expenditure measurement, media planning and buying systems for various national and local media.

INTERNET
On-line network of computers; includes World Wide Web which is envisioned by Out-of-Home industry future interactive service for market data, inventory listings, video drive-bys, sales transactions, as well as other uses.