Wikipedia
NRW-Express
The NRW-Express is a Regional-Express service in the German state of North Rhine-Westphalia (NRW), running from Aachen via Cologne, Düsseldorf, Essen, Dortmund and Hamm to Paderborn as line RE 1. The line is operated by DB Regio NRW.
The service has one of the highest levels of patronage in Germany (about 34,500 persons per day, mainly commuters and students) and is susceptible to delays of 2.9 minutes on average per journey.