Once you are fully enrolled and have paid your semester contribution, you will receive your semester ticket. This ticket is valid for public transportation in all of Germany. In Düsseldorf you can travel by tram, bus and short-distance trains. For longer travels you can travel by regional trains ‘Regionalbahn RB’ / ‘Regionalexpress RE’. Be aware that the ticket is not valid for travels by Flixtrain as well as EC/IC/ICE or any other fast trains.
Citymapper - includes various ways of transportation
DB Navigator - App of Deutsche Bahn, the German Railway Company
Rheinbahn - Düsseldorf public transport with real-time departures