Outdoor advertising guide
How to Read Billboard Traffic and Reach Estimates
Understand what billboard traffic counts mean, how they differ from reach and impressions, and how to compare outdoor locations responsibly.
Traffic is not the same as reach
A traffic count estimates movement past a location. Reach estimates the number of different people exposed, while impressions represent total exposure opportunities, including repeat journeys. Treating these numbers as interchangeable can overstate campaign performance.
Compare visibility, not only volume
A location with lower traffic can outperform a larger road when the board is closer, better oriented or visible for longer. Road speed, angle, obstruction, lighting and message complexity all affect whether an exposure becomes noticeable.
- Compare boards using the same reporting period.
- Ask how and when traffic was measured.
- Review photographs from the actual viewing direction.
- Use estimates for planning, not as guaranteed outcomes.
Measure the campaign outcome
Connect the billboard plan to outcomes the business can observe: branded search, store visits, direct traffic, campaign codes or geographic lift. No single metric proves impact by itself, so define the measurement plan before launch.