Context Train commuter service in Stockholm in 2012. Content Description of the train commuter service during one week-day. The data includes information about: - train timetable. - passengers flow Acknowledgements The data is generated with the help of Samtrafiken - Trafiklab API (see. www.trafiklab.se). Inspiration - Crowdedness: How crowd the trains are? Which lines are crowded? How frequent should the train run?