Andrew Liszewski reported on an interesting idea being implemented by Canadian authorities:

• The City of Calgary has installed a traffic tracking system that works by detecting Bluetooth signals and the hardware code associated with it.
• The fifteen sensors analyze how long it takes for the devices to cross the highway. That data is then used to determine the amount and flow of traffic on the road.
• Overall the system costs $400,000.
• Algorithms ensure that pedestrians and other anomalies aren’t counted as a part of the data.
• Protections are also put into place to ensure the drivers’ privacy.

Read more about the system and how it works over here.

Source: Gizmodo