Metropy, Seoul’s Seat-Finding Subway Optimizer

Field notes

The calculator accepts origin, destination, weekday, and boarding time, then compares every car on a ten-car Line 2 train. Its model accounts for both the chance that seats become available at intermediate stations and the competition to claim them, while configurable weights let riders favor immediate seating or lower boarding congestion. The page cites 43 stations, 316,800 congestion records, ten data sources, and TMAP travel-time data as inputs.