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US spending decreased significantly across out-of-home (OOH) ad formats from Q1 2020 to Q1 2021, but not all categories were affected equally. For billboards, outlays fell from $1.26 billion to $1.10 billion, but the format’s share of total OOH ad spending grew from 67.7% to 85.7%. Transit, place-based, and street furniture advertising all saw the steeper percentage drops, shrinking their shares of the outdoor ad revenue pie.

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