[qwertox]

Having the train use Bluetooth Low Energy advertising to broadcast its location and some other data, like time-to-next station, next station name, would be a nice feature.

GPS spoofing should not be done in my opinion until the negative side-effects are well understood.

[h1fra]

This is the case in some stations in Paris. To retrofit ancient trains with station announcements, they have installed Bluetooth broadcasters on each station so the train can detect when it enters/leaves and announce the next station for visually impaired people. Smart and simple imo.

https://www.leparisien.fr/info-paris-ile-de-france-oise/tran...

[immibis]

Not balises?

[gield]

Waze Beacons [1] do this for car tunnels. Some underground systems, e.g. in Barcelona IIRC, also use BLE beacons to help phones position themselves.

[1] https://support.google.com/waze/partners/answer/9416071

[flemhans]

Ona similar note I always thought it would be cool if there was a standard allowing (trusted) WiFi access points to relay location data, so that in-flight WiFi could pass on the plane's GPS feed.