[ff7c11]

I thought the same. But I can't actually come up with a good reason. Maybe German trains are so punctual that you can infer their position anyway. Can someone in Berlin measure the lag? Next time I'm back there I might test it.

[pyvpx]

I can only speak for Berlin and will say punctuality is not the strong point of S or U-bahn here.

[odiroot]

It's pretty good for underground U-Bahns and Stadtbahn. Ringbahn, Nord-Süd Bahn and overground U-Bahns are less reliable.

[_yy]

> Maybe German trains are so punctual that you can infer their position anyway.

That's what the map is doing, anyway (plus delays).