The real time text thing is a slight problem
The fundamental issue is information since IE don't make it available and the LUAS site has nothing how are we to know? Sort of a small army dug in at strategic luas and train stations it all depends on IE providing information which they can't manage. The current IE setup, DART text simply reads back the station departure board for all train id's begining with E (no prizes for what E stands for) its often wrong
Now if you live on the Kildare line
crmheuston@irishrail.ie and include "Newbridge Text Alerts" as the subject, include your mobile number in the message text
End of the day its IE's and the RPA's problem to implement, elsewhere in the world its no problem but Ireland it doesn't happen. Rumours there might be something coming