Matt Frei is Leading Britain's Conversation.
How does the live traffic system in sat navs work?
Bavel, East Ham
Name: Rob, Rochester
Qualification: has been fitting in car technology since 1994.
In the late nineties and early noughties mobile phone networks teamed up with sat navs so that they would be sent signals depending on the locations of mobile phones. So, if a lot of mobile phone users from one network are sat in a que that information is received through signal masks therefore tracking phone signals.