Start with the glance test
Before any data collection, ask the simplest question: can a stranger who has never seen this business, glancing at a photo of the board for two seconds, tell you what it's selling and what to do next? If not, no amount of media spend will fix that gap — it's a creative problem, not a placement problem.
Track something unique to the board
Even without a research budget, a dedicated phone number, a short unique URL, or a promo code printed only on the board gives a clean, attributable signal that a click-through report never could for outdoor. Compare activity on that channel during the flight against a normal baseline period.
Watch branded search around the flight dates
A lift in people searching the business name directly, timed to when the board went up, is one of the more reliable low-effort signals available — it reflects genuine recall rather than a manufactured metric, and most free analytics tools already surface this trend.
Ask the people the board is supposed to reach
A short, informal survey of customers — "how did you hear about us?" — asked consistently over the flight period is unglamorous but effective. It won't produce a scientific number, but a consistent uptick in "saw it on the highway" answers is a real signal.
Key takeaways
- Start with the glance test — if a stranger can't parse the board in two seconds, no amount of placement fixes it.
- A unique phone number, code, or URL gives outdoor its own clean, trackable signal.
- Branded search lift and a simple "how did you hear about us" habit both work without a research budget.
Want to check your own billboard against what this article covers?
Try the Billboard Conversion Predictor — free →