Official count: traffic counts taken from official sources such as city, state or county departments of transportation.

Off-premise sign: A sign advertising a product or service different that those provided at the property on which the sign is located. A billboard is an off premise sign.

On-premise sign: A sign advertising goods or services sold where the sign is located.

Outdoor Advertising Association of America (OAAA):
The national organization supported by the outdoor media industry that sets basic standards and promotes the use of outdoor media.

Outdoor media posting calendar: An industry standard calendar for planning outdoor media. Each month begins on a Monday, and consists of either for or five full weeks. The outdoor media calendar standardizes posting and billing cycles throughout the year.

Out-of-service: An advertising structure temporarily or permanently unavailable for advertising purposes.

Outside panel: Outdoor media structure located closest to the street, where two or more panels are side by side.

Overage: Extra posters provided to plant operators to replace any that may become damaged due to weather or other factors during the display period. Recommended overage is 15% of total poster order.

Overlay: A paper strip pasted on the face of an existing panel to display a price or other promotional information.