Audience research
Part of Match out of home advertising research methods to the buying decision
Before you pick out of home advertising survey tools, check the sample
Compare out of home advertising survey tools in England on sample quality, weighting and compliance, plus a worked £6,000 example and key questions to ask.
What to take away
- Most teams choose on price and dashboard looks, then find the sample cannot support the decision they need to make.
- A tool is only as good as its sampling frame, weighting and audit trail.
- Online panels skew towards people who are online, which matters for posters, transport and high street formats.
- Compliance shapes tool selection: consent wording under UK GDPR guidance and resources decides what you can ask and keep.
- Budget the fieldwork before the licence fee, because an underpowered survey wastes both.
Which survey tools actually measure out of home audiences?
Three families of tool turn up in most pitches. Self-serve platforms sell a licence and you write the questionnaire. Agency panels sell fieldwork plus a named project manager. Hybrid tools pair a panel with passive data to correct the recall bias that affects poster research.
Pricing models differ as much as the methods. Some vendors charge per seat, some per project, and travel-behaviour questions often sit in a higher tier than standard demographics.
Out of home exposure is incidental: people pass a site without deciding to look, so a survey about attention needs a design that allows for it. The audience research guide for England sets out how sampling frames differ by format.
Does the sample represent the places you are buying?
A national quota of 1,000 adults tells you little about a bus shelter in Leeds or a roadside banner in Kent. Ask how many respondents live, work or travel through each site's catchment. If the tool cannot report at that grain without merging regions, its output will not support a local buy.
Check recruitment against the audience. Online panels under-represent older people, people without broadband and some lower-income groups, all of whom still travel past outdoor sites. A tool that cannot reweight to a known travel population describes its panel, not your audience.
Ask for the achieved sample rather than the target, and for the recruitment source behind each subgroup.
What should the questionnaire and weighting look like?
Recall windows should match the campaign. Asking about a poster seen four weeks ago invites guessing. Frequency questions need a CAP, or a small group of frequent travellers dominates the average. A short pilot on 50 respondents will expose ambiguous wording before you commit the full budget.
Weighting should name its variables and source, for example age, sex and region against published population estimates. Where a tool cannot show its weighting scheme, treat the percentages as indicative. The same discipline applies to rivals, which is why out of home advertising competitor research starts with identical sample questions.
Worked example: a two-wave survey in a single English city
A regional advertiser wants to test awareness before and after a four-week bus-side campaign. Illustrative figures, not a quote:
| Item | Cost |
|---|---|
| Panel licence, one year | £3,600 |
| Wave one fieldwork, 400 completes | £1,200 |
| Wave two fieldwork, 400 completes | £1,200 |
| Weighting and reporting | £0 (included) |
| Total year one | £6,000 |
At £6,000 the fieldwork is two fifths of the spend, so a third wave costs comparatively little. A tool at £2,400 a year with £2,500 per wave costs £7,400 for the same design and buys less comparable data.
Ask whether wave two can reuse the same respondents. A matched sample detects change with fewer completes per wave, though it introduces its own bias.
How do you check compliance before signing?
Questions that collect location, travel habits or device identifiers are personal data. The lawful basis and retention period sit with you, not the vendor. Ask for the data processing agreement before the pilot.
Ad content tested in the survey also needs to be defensible, and the Consumer Protection from Unfair Trading Regulations 2008 set the standard for commercial claims shown to respondents. Where a mock-up carries a price or a comparison, test it against the CAP Bitesize guidance on ad rules applicable to OOH campaigns.
Common questions
Can I run out of home advertising surveys with a general consumer panel?
Yes, if the panel can be weighted to a travel population and reports at the geography you are buying. Otherwise the results describe the panel, not the audience passing your sites.
How many responses do I need for a city-level read?
There is no universal number, but a city read normally needs several hundred completes per wave so subgroup comparisons hold. Ask the vendor for the margin of error on the smallest group you will report.
Should passive location data replace survey questions?
No. Passive data shows movement, while surveys capture recall and claimed behaviour. The stronger tools combine both and label each figure's source.
Who owns the survey data after the campaign?
That is a contract term, not a technical one. Agree ownership, export format and deletion dates in writing before the first wave goes live.
