Molly Ahser has just put together a table that summarises some of the best (as far as we can tell) sources of information for estimating footfall (the number of people passing particular places during the day).

The location of the sensors in the cities for which data can be accessed can be viewed at: Locations_with_sensors.ipynb

City Sensor type Number sensors Resolution Time period Data link  
Leeds Camera 10 Hourly 2014-2022 Weekly csvs: https://tinyurl.com/4y3dxxzb  
Bologna Phone sensing 10 Hourly 11/19-08/22 Monthly csvs: https://tinyurl.com/2p8ty9f2  
Skopje Phone sensing 19 Hourly 04/20-04/21 Monthly csvs: https://tinyurl.com/yc6b5xr8  
Turin Phone sensing 8 Hourly 11/19-08/22 Monthly csvs:https://tinyurl.com/yc7sdme5  
Cluj-Napoca Phone sensing 6 Hourly 11/19-08/22 Monthly csvs: https://tinyurl.com/2z7a3m3k  
Dublin Cameras 23 (some added later) Hourly 2007-2014 Yearly csvs: https://tinyurl.com/2n5he5rv.
Existing Analysis: https://tinyurl.com/5n8ht2zt
 
York Cameras 6 Hourly 2009-2022 One csv: https://tinyurl.com/ymj68ke6.
Existing Analysis: https://tinyurl.com/bdz24use
 
Liverpool (Australia) Cameras / Wifi-sensors 13 cameras/4 sensors Not sure 2021-22 One csv: https://tinyurl.com/3kekyzs7 (only includes bikes/cars and not pedestrians  
Melbourne Sensor detecting movement. 65 (some added later) Hourly 2009-present One csv: https://tinyurl.com/45jnppsa
Existing analysis: https://tinyurl.com/4xdd6epx
 
Edinburgh Drakewell counters; not documented how they work 58 (including cycle counters) Hourly 2015-present Dashboard with data for specific days https://tinyurl.com/yk2dafse.
Raw data not available
 
Glasgow Springboard (fixed footfall sensor) 7 Hourly 2010-present Data: https://tinyurl.com/y24bpa36 (not sure on format as date is not specified  
  CCTV cameras 40 15/30 mins October 2021-present Daily data: https://tinyurl.com/ms5nyzb3 (not sure how to get 15/30 min data)  
San Diego Infrared sensor using body temp 11 walking counters (more for cycling) 15 mins 2012-present Dashboard: https://tinyurl.com/5xmz9e9k.
Raw data not available
 
Bath Cameras 10 Hourly 03/17-05/19 Data summary: https://tinyurl.com/yck2asyp.
Raw data not available.
Existing Analysis: https://tinyurl.com/2p93hztd
 
  Phone sensing 1 Daily 01/19-03/20 Data analysis: https://tinyurl.com/2p8xxt8h.
Raw data not available
 
Helsinki Bluetooth N/A     Data heat map: https://tinyurl.com/bdfjhssm.
Raw data not available