The Verkehrsverbund Berlin-Brandenburg spans two states in a federal country. It is managed by the two states, counties and cities. You have common tarificiatio

The Verkehrsverbund Berlin-Brandenburg spans two states in a federal country. It is managed by the two states, counties and cities. You have common tarificiation, so you can switch easily between different modes and counties. https://en.wikipedia.org/wiki/Verkehrsverbund_Berlin-Brandenburg https://en.wikipedia.org/wiki/Verkehrsverbund_Berlin-Branden...