[lbotos]

I'm not sure _how_ they are going to do this, when most of the lines don't have this technology (it's literally turn the the century switching technology):

http://www.theatlantic.com/technology/archive/2015/11/why-do...

[jonbaer]

If they can equip the mice down there with repeaters they could get a pretty good 99% coverage rate. (BTW it is possible ... http://blog.tanaza.com/blog/bid/296349/Dogs-and-cats-turned-...)

[kalleboo]

Perhaps they same way they do it on buses?

[superuser2]

No, you can't reliably receive GPS signals in a subway tunnel.

[nrb]

If you have wifi hotspots in every station you can track the trains that way, no GPS required.

[kalleboo]

I thought buses mostly used thr odometer? At least the ones where I lived used to use the odometer for the "next station" LED signs in the buses, and the bus stop arrival signs showed up not long after.