[askvictor]

An increasing number of roads administrations use Bluetooth to track traffic movement. They can get a signature of a car at one intersection, and track that car as it moves through the city. I guess they look for any Bluetooth device in the area. Supposedly it's anonymized, but you never know. I know they do this in Sydney Australia, not certain where else.

[joshschreuder]

Interesting, I'm in Melbourne and at least once I got interference when I was crossing at an intersection. Maybe that's why.