The core rules
- Seven words or fewer. One idea per board. If it needs a paragraph, it needs another medium.
- One big image. A single, bold visual beats a collage every time.
- Brand it big. Logo large and immediately visible — usually not tucked in a corner.
- Contrast is everything. Dark on light or light on dark; avoid similar hues (red on green, blue on purple).
- Simple, heavy type. Bold sans-serifs, no scripts, generous letter spacing. Upper/lower case reads faster than ALL CAPS.
- One clear action. An exit, a short URL, a memorable phone number, or a QR code where people are stationary.
- Test small. Print your design at 2 inches wide and view it from 10 feet — that approximates highway viewing.
Type size & legibility
| Viewing distance | Minimum letter height |
|---|---|
| 100 ft | ~4 in |
| 200 ft | ~8 in |
| 300 ft | ~12 in |
| 500 ft | ~20 in |
| 1,000 ft | ~40 in |
Design for the context
- Highways — 3–5 seconds of attention; ultra-simple, directional.
- Urban & street level — closer viewers allow a bit more detail; QR codes can work.
- Transit interiors & place-based — long dwell; you can tell a story, add offers and codes.
- Airports — premium, aspirational; business travelers in a waiting mindset.
- Digital — use dayparting and data triggers; on roadside boards keep each frame static and self-contained.
DOOH creative tips
- Make the first frame work alone — viewers may only catch one.
- Use contextual messaging: time of day, weather, local landmarks, live countdowns.
- Build multiple versions and rotate to avoid wear-out.
- Check brightness: very white backgrounds glare at night; mid-tones read better.
File & production specs
- Static: vendors usually want print-ready PDF or TIFF at scale (often 1"=1' at 300 dpi or similar), CMYK, with bleed.
- Digital: JPG/PNG (RGB) at exact pixel dimensions; MP4 for video-capable screens; check max file sizes.
- Approvals: most vendors and transit authorities review copy — allow time for edits.
Always request the vendor's spec sheet before design begins, and design to the live area, not the full trim.
Common mistakes
- Too many words or a long URL
- Tiny logo, or a logo that only appears in the corner
- Low contrast or busy photography
- Multiple calls to action
- Creative that only makes sense to insiders
- Running the same creative for a year without refresh
Recommended tools
Design
Canva Pro ↗
Billboard, poster and DOOH templates sized to vendor specs; brand kits for consistent creative.
Design
Fiverr ↗
Hire a billboard, vehicle-wrap or motion designer by the project.
Some links are partner links; we may earn a commission at no extra cost to you. All tools
Price out your campaign
Plug in impressions, CPM and flight length to see a realistic budget.
