   // Filter stations to only show those with schedule data
            stations = allStations.filter(station => {
                const hasSchedule = station.schedule_summary && 
                                  station.schedule_summary.start !== 0 && 
                                  station.schedule_summary.end !== 0;
                return hasSchedule;
            });
            
            if (stations.length === 0) {
                const totalStations = allStations.length;
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