Fir anyone else curious: they used anonymous mobile device location data, so the only know distance traveled and time stayed. They don’t know which specific mode of transportation was used.
Oh, they definitely could, but they didn’t for this study. The way they said they collected information for this one was more focused on “are people changing movement behavior during COVID” so they just looked at start and stop points, distance and dwell time, anonymized to the county level.
Fir anyone else curious: they used anonymous mobile device location data, so the only know distance traveled and time stayed. They don’t know which specific mode of transportation was used.
They can use speed to filter for walking / biking as well as if their path stays on the road
Not perfect, but a really good guestimate
Oh, they definitely could, but they didn’t for this study. The way they said they collected information for this one was more focused on “are people changing movement behavior during COVID” so they just looked at start and stop points, distance and dwell time, anonymized to the county level.