5 ms·
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): htt
by lbotos 11y ago
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-dont-we-know-where-all-the-trains-are/415152/ http://www.theatlantic.com/technology/archive/2015/11/why-do...
- kalleboo 11y agoPerhaps they same way they do it on buses?
- superuser2 11y agoNo, you can't reliably receive GPS signals in a subway tunnel.
- nrb 11y agoIf you have wifi hotspots in every station you can track the trains that way, no GPS required.
- kalleboo 11y agoI 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.
- jonbaer 11y agoIf 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-into-mobile-WiFi-hotspot http://blog.tanaza.com/blog/bid/296349/Dogs-and-cats-turned-...)