19-11-2015, 11:52 AM
On 1st March 2005, according to Wikipedia: https://en.wikipedia.org/wiki/Autofahrer...ionssystem
Don't forget the BBC's Carfax system!
This was a trial that started in 1979/80 and operated on 500kHz (formerly a maritime distress frequency).
From memory, I think there were 4 synchronised transmitters around London, where the trials were carried out. I think the idea was that, based on relative signal strengths, the special decoder would only switch on if the traffic information was relative to your location.
Don't forget the BBC's Carfax system!
This was a trial that started in 1979/80 and operated on 500kHz (formerly a maritime distress frequency).
From memory, I think there were 4 synchronised transmitters around London, where the trials were carried out. I think the idea was that, based on relative signal strengths, the special decoder would only switch on if the traffic information was relative to your location.
