A mobile phone can be tracked to less than a metre.
https://www.bbc.com/news/world-europe-64820085
Yet, there wasn't a level of technology that was able to trace & locate each train in Greece.
https://www.arnolditkin.com/blog/train-accidents/the-5-worst-train-accidents-in-history
https://a-z-animals.com/blog/the-deadliest-train-crashes-in-the-world
https://www.railway-technology.com/features/featurethe-worlds-deadliest-train-accidents-4150911/
