Airport route notes need current source links and human fallback rules

Airport rail and transit-card facts should be checked against current pages, while fallback rules stay in plain language.

Airport route notes become unreliable when fare facts, payment assumptions, and fatigue choices are mixed into one sentence. I prefer two blocks: current source links for rail, card, terminal, and ticket facts; then human fallback rules for rain, luggage, late check-in, phone battery, and the last walk to the hotel. The source block can change without rewriting the whole note. The fallback block explains when a cheaper route stops being the better arrival choice.