How Route Calculation Works

The route planner models stations as graph nodes and metro segments or walking links as graph edges. Each edge carries line, distance, and travel-time attributes.

The engine chooses practical paths using travel time and transfer costs, then groups consecutive stations into readable line-by-line segments.

Fare results use city-specific fare strategies where verified data is available. Schedule context is shown when GTFS-derived service calendars and departures exist for that city.