Input (grade 13): The Central Station and the Airport Station (Flughafen-Bahnhof) are connected to the national and European high speed (Intercity / Eurocity, IC / EC) and extreme high speed InterCityExpress.
Output (grade 12): Düsseldorf has two stations in the German high speed train network (Intercity Express, ICE) - its Central Station and the Airport Station.