Ticketing based on RFID is already widely available: for instance 10 million daily travellers of the public transport system in Paris have already access to an electronic ticket12 .
One may easily envision that this system not only permits user access to the stations, but also that readers in the doors of the trains and buses enable an accurate tracking of every *connection* and route of every traveller.

Не совсем понимаю смысл "connection" в данном контексте.

Спасибо.