4 ms·
Wow, I knew they rolled out some access to countdown from the ibus system, but I thought hell would freeze over before they'll allow people to track tube locati
by kokey 13y ago
Wow, I knew they rolled out some access to countdown from the ibus system, but I thought hell would freeze over before they'll allow people to track tube locations.
- 10dpd 13y agoIts probably not the actual location of the tube, but a guestimate based on the departure time, arrival time and the distance between stations.
- diroussel 13y agoIt depends on the line. The more modern lines, have induction loops every 3 meters that allow precise measurement of current position, and also data for voice comms to the line controller. On older lines, they can only detect when a tube changes power circuit and the resulting blue/white spark sends a measurable pulse down the power system. In this case, yes, they have to just count trains into and out of a section. I learnt this by chatting to a TFL engineer in a pub, he designed the signalling systems equipment.