I’d be interested to see the totals year by year.
Are the samples from the same location, same weather, same day of week?

Thanks for the detailed response. Appreciated. I’ll check out the report links you mentioned.

The reports (found at the bottom of the Council webpage) gives more details about the methodology but basically the market research company randomly samples people from across the city and ensures that there is a geographic and demographic balance matching the city’s stats. And because the cycling questions are just 2 out of a lot of different questions, you’re not really going to get the situation where (say) only regular cyclists complete it.

This isn’t like some other Council surveys where they ask you via email, social media, etc to answer some questions about some topic (housing, transport, city life, etc) – there is probably a greater chance of sample bias there.

Do you know if there were any sample bias in the surveys and, if so, how was it mitigated?

Cheers