I remember my colleague from MFF UK, Robert Babilon, producing his first real-time map of Czech trains in 2004.

The page, called Babitron, still exists and still keeps that delightful 2004 look. I visited it a few days ago. Unfortunately today there is a message "We are moving Babitron to a different server", so the link isn't working.

https://kam.mff.cuni.cz/~babilon/zpmapa2