How big is the out-of-home advertising industry?

US OOH advertising revenue has reached roughly $9 billion annually and continues to grow, per the OAAA, with digital OOH the fastest-growing segment.

What percentage of people notice OOH ads?

Industry research from the OAAA finds the large majority of US adults notice out-of-home advertising, and a majority report taking action after seeing it.

What is the ROI of OOH advertising?

OOH is regularly cited as one of the highest-ROI media, often returning several dollars of value per dollar spent, helped by its low cost per thousand impressions.

Mobile Billboard & OOH Advertising Statistics (2026)

Out-of-home (OOH) advertising, the category mobile billboards belong to, is a multi-billion-dollar, growing medium with some of the highest recall and ROI of any channel. Below are the key statistics advertisers cite when evaluating mobile billboard trucks, with sources.

Market size and growth

US out-of-home advertising revenue has reached roughly $9 billion a year and has grown year over year, per the Outdoor Advertising Association of America (OAAA).
Digital out-of-home (DOOH), which includes LED billboard trucks, is the fastest-growing OOH segment, and programmatic DOOH spend is rising sharply.
OOH is one of the few traditional media still growing, while many channels decline.

Attention and recall

Industry research from the OAAA has found that the large majority of US adults notice OOH advertising, and a majority take an action after seeing it.
Mobile and out-of-home ads are consistently cited for high recall relative to online display, because they appear at street level and cannot be skipped or blocked.

ROI and cost-efficiency

OOH is regularly ranked among the highest-ROI media, often cited as returning several dollars of value per dollar spent.
OOH typically delivers a low cost per thousand impressions (CPM) compared with TV and digital, especially for broad local reach.

Mobile billboard truck specifics

A single mobile billboard truck generates roughly 30,000 to 70,000 impressions per day and 300,000 to 500,000 over a typical campaign.
LED truck campaigns can launch in as little as 48 hours because there is nothing to print.
Typical day rates run $1,500 to $5,000 for LED trucks and from about $800 for static, all-in. See our cost guide.

Why the numbers favor mobile billboards

The combination of growing OOH demand, high recall, low CPM, and the targeting and proof-of-performance that a routed truck adds is why advertisers keep shifting budget into mobile billboards. For the effectiveness case in depth, see do mobile billboards work.

Figures are drawn from OAAA, Nielsen, and industry reporting; ranges reflect common published estimates. Confirm current figures for formal media plans.