Audited Circulation: The Traffic Audit Bureau, Inc. (TAB) independently audits records and circulation data for the outdoor media according to established procedures approved by the buyer and seller members.
Avails: Poster or bulletin space available at any given time.
Blanking: A white paper border applied between the poster and panel molding.
Bulletins: Very large advertising structures that may be posted or painted. The most common size is 14 X 48 ft.
Circulation: The basis of determining the value of outdoor advertising. Outdoor circulation is based on the number of vehicles and pedestrians that pass a given advertising structure during a specified time period.
Cost Per Thousand (CPM): CPM refers to the cost of reaching 1000 potential viewers with an outdoor display. This value is established by dividing the displays monthly cost by the monthly circulation in thousands.
Cross Reader: A poster or bulletin that is visible across lanes on the opposite side of the roadway.
Customized Rotation: Bulletins that are moved periodically to new locations throughout the market area according to the client's marketing objectives.
Daily Effective Circulation (DEC): The average number of persons exposed per day to a sign or a group of signs.

Gross Rating Points (GRP): GRPs for outdoor refer to daily circulation, with one rating point representing a circulation equal to 1% of the market population.
Minimum Showing: The smallest number of posters (showing) that may be purchased by an advertiser without paying single-panel rates.
Potential Viewers (PV): A projection of the maximum number of persons who have the opportunity to view a given outdoor display. This equates with the Daily Effective Circulation (DEC).
Rotating Bulletin: Moving the advertiser's message between display locations at designated intervals to achieve greater coverage of a market.
Showing: The total number of displays included in a single contract or "buy." GPR/showings are commonly designated as #100, #75, #50 and #25 according to the population of the target market.
Traffic Audit Bureau (TAB): The official circulation bureau for the outdoor-advertising industry, which audits display circulation as a third-party, independent source. Although TAB's membership includes plants, advertisers and agencies, it is a non-profit authority for maintaining industry standards.
Wrap or Wrap-Around: Refers to any flexible vinyl, printed or painted, that is installed or secured to the sign by wrapping or stretching it around the outside edges of the sign and securing it to the back of the sign with ratchets or any other method.