How intelligent software can ensure high quality passenger information when it really matters

Winter 2021 in Hannover, Germany: It snows in the city about once every ten years, but when it happened this time, it didn’t take long for the public transport to fall apart. What matters most for people waiting in the cold to catch their train or bus is reliable and, above all, up-to-date travel information. This was, however, exactly what was missing here, while the snowfall quickly made the traffic a city-wide nightmare. – Why don’t passenger information systems work well when they are really needed?