Policy · Evidence ledger
Sources you can open and audit
The public layer behind BigBoards: dated market releases, SEC filings and measurement guidance.
What appears here
This page lists evidence used in the current published inventory. Competitor research and search-demand observations informed architecture but do not support market claims.
Access and preservation
Each record retains its publisher, title, URL, observed date and claim scope in the internal source ledger. A source link can move or become restricted; that does not broaden the claim it originally supported.
Citation rule
A citation validates only the matching claim and scope. It is not a blanket endorsement of every statement on a page or every conclusion a publisher may draw.
Published evidence ledger
- OAAAMarch 27, 2026Out of Home Advertising Revenue Reaches Record $9.46 Billion (opens in a new tab) ↗
Used for: 2025 U.S. OOH revenue, year-over-year growth, digital share and format totals.
- OAAAMay 19, 2026OOH Hits New First Quarter High as Revenue Reaches $2.12 Billion (opens in a new tab) ↗
Used for: Q1 2026 U.S. OOH revenue, year-over-year growth and digital share.
- OAAAAugust 18, 2026From Coca-Cola to OpenAI, Brands Are Betting Bigger on OOH (opens in a new tab) ↗
Used for: Q2 2026 U.S. OOH revenue, year-over-year growth and digital share.
- OAAAApril 20262025 OAAA MegaBrands (opens in a new tab) ↗
Used for: 2025 U.S. OOH revenue totals and shares by billboard, transit, street furniture and place-based formats.
- OAAAYear end 2025OOH Displays — Year End 2025 (opens in a new tab) ↗
Used for: Published U.S. OOH display counts by format.
- OAAACurrent guide pageOOH Measurement & Analytics Guide (opens in a new tab) ↗
Used for: Planning, transaction, measurement and attribution concepts.
- GeopathCurrent methodology pageGeopath Audience Measurement Methodology (opens in a new tab) ↗
Used for: Modeled U.S. OOH audience measurement and the use of multiple data resources.
- GeopathCurrent fundamentals pageMeasurement Fundamentals: Reach and Frequency (opens in a new tab) ↗
Used for: Definitions of reach and average frequency in OOH audience measurement.
- Media Rating CouncilNovember 2023 draftOOH Measurement Standards — Public Comment Draft (opens in a new tab) ↗
Used for: OOH measurement terms, format-dependent techniques and disclosure of limitations.
- OAAAJanuary 31, 2023Planning for OOH Media Guide (opens in a new tab) ↗
Used for: OOH planning concepts, gross impressions and opportunity-to-see.
- U.S. Securities and Exchange CommissionFiled 2026Lamar Advertising Company 2025 Form 10-K (opens in a new tab) ↗
Used for: 2025 company and billboard revenue, display footprint and digital billboard disclosures.
- U.S. Securities and Exchange CommissionFiled 2026OUTFRONT Media Inc. 2025 Form 10-K (opens in a new tab) ↗
Used for: 2025 revenue by billboard, transit and digital categories plus digital display counts.
- U.S. Securities and Exchange CommissionFiled 2026Clear Channel Outdoor Holdings 2025 Form 10-K (opens in a new tab) ↗
Used for: 2025 America segment revenue, digital revenue share, display footprint and DMA coverage.
- RevealObserved September 2026OOH Performance Measurement (opens in a new tab) ↗
Used for: Vendor-described incremental-lift method using an exposed group and synthetic control.