Choose waiting spots
Bus shelters, train platforms and queues give people the seconds they need to scan. Skip fast roads.
Where to use
Outdoor codes that people can actually scan
A QR code on a highway billboard rarely gets scanned — nobody stops. But at a bus stop, a station platform or a pedestrian wall, an outdoor code can pull real traffic. Here's how to size it and where to place it.
- Best where people wait
- Very large sizes
- Honest about limits
Design tips
Place it where people stand still
Size for the real distance
Measure how far away the nearest viewer stands and size from there — outdoor codes are far bigger than print.
One clear reason to scan
A single, short call to action — "Scan to enter" or "Scan for the drop" — beats a wall of copy at a glance.
Billboard QR size guide
Outdoor codes are read from several metres, and only where people can pause. The rule of thumb: minimum size ≈ scan distance ÷ 10.
| Context | Minimum size | Scan distance |
|---|---|---|
| Poster at eye level in a pedestrian area | 10 × 10 cm | up to ~2–3 m |
| Transit-stop or bus-shelter panel | 20 × 20 cm | up to ~5 m |
| Large roadside billboard | 30 × 30 cm or larger | up to ~8–10 m |
| Building-side or mural | 40 × 40 cm or larger | ~10 m and beyond |
Note: Drive-by billboards are the weakest spot for QR — treat any code above walking distance as a bonus, not the main call to action.
Where it works
Outdoor placements worth a code
Transit stops & platforms
A waiting commuter has time to scan — the strongest outdoor spot there is.
Pedestrian areas
High streets and plazas let people stop and scan at eye level.
Brand campaigns
Extend an awareness push to a landing page for those who want more.
Event promotion
Point a poster to tickets or an RSVP while people are stopped in front of it.
Product launches
Send scanners to a drop, waitlist or reveal page.
Campaign tracking
Measure which locations and creatives actually earn scans.
Billboard QR code FAQ
Do QR codes on highway billboards work?
Rarely. Drivers can't safely stop or hold a phone up, and a moving car can't lock onto a code. Outdoor QR works where people are stationary — stops, platforms, queues and pedestrian areas.
How big does a billboard QR code need to be?
It depends on the nearest viewing distance. At a bus stop (about 5 m) aim for 20 cm; on a large billboard read from 8–10 m, 30 cm or more. Size from the closest realistic viewer, not the whole board.
Where should I put the code on the design?
Low and to one side, at a height people can reach with a phone, with a clear quiet zone and strong contrast. High-up codes on tall billboards are almost never scanned.
What should it link to?
A fast-loading mobile page with one clear action — tickets, a signup, a drop. People scanning outdoors won't wait for a heavy site to load.
Can I tell if the campaign worked?
Yes. Dynamic codes count scans by location and time, so you can compare placements and creatives and see what actually earned attention.
What makes this placement work
- Use a large code, strong contrast and a very short call to action. Test from the real viewing distance, not from a design monitor.
- Preserve the quiet zone around the code.
- Avoid decorative changes that reduce foreground/background contrast.
- Scan a production proof with more than one phone before approving the full run.
- Match the destination to the placement. Common choices include Website, Landing page.
Put codes where people actually stop
Create an outdoor QR code free — track it by location so you learn what works.