3 ms·

This is interesting. Can you suggest any source to investigate more about this?

• sigmaprimus 7y ago
  Im assuming you want information regarding bluetooth traffic monitoring and not how big tech forces users to give up privacy. Here is a paper I found that covers it, I worked in the traffic industry and attended several presentations at IMSA trade shows regarding this subject. https://www.hindawi.com/journals/wcmc/2018/3251598/ https://www.hindawi.com/journals/wcmc/2018/3251598/ Actually that paper is about a newer technique that would require an app to be installed. The method I am aware of and currently in use, uses the 48 bit unique identification of phones with bluetooth discoverability turned on. When a car with one of these phones in it drives down the highway the address is timestamped at multiple sensor locations. From analysing these records, traffic flow can be observed. Eg. It took 2 minutes for a phone to be discovered by two different sensors(beacons) 2 miles apart, therefore traffic is flowing at 60mph. Not everyone has a phone with bluetooth discovery turned on but there are enough to make a usefull observation. As a matter of fact, I currently live near a Highway and just scanning for available wifi hotspots, I am amazed at how many cars drive by with mobile hotspots active. (I pick up thier SSIDs)