sentences:  In 2001, the operating company Hjørring Privatbaner A/S merged with Skagensbanen A/S (SB) to form the railway company Nordjyske Jernbaner (NJ).Headquartered in Hjørring, the company is now responsible for running the Hjørring–Hirtshals and Frederikshavn–Skagen lines.In 2005 the current Siemens Desiro trains, which have a maximum speed of 120 km/h (75 mph), were introduced.