A Danish town has been using Bluetooth sensors to track traffic patterns
One big promise of the connected car revolution has been the potential to help clear up traffic problems. When every vehicle and traffic signal is connected to the cloud, municipalities and local governments should be able to have a constant view of the traffic on their streets, aware of any problems almost instantly. The catch? It’s going to take a long time before there are sufficient vehicle-to-infrastructure (V2I) or even vehicle-to-vehicle (V2V)-equipped cars on our roads. But the city of Aarhus in Denmark has shown you don’t need to wait for V2x to finally penetrate the market to start doing that; all you need are outdoor Bluetooth sensors.
For some time, Aarhus has been using Bluetooth sensors to collect traffic pattern information. As people drive around, emitting Bluetooth signals, the sensors log their movements around the city. In doing so, their traffic patterns can flag and reveal problems that the city needs to fix.
Source: Ars Technica