The ICE 1 is the first series of German high-speed trains and one of five in the InterCityExpress family. Revenue service at speeds up to 250 km/h (155.3 mph) started in 1991. It was raised to 280 km/h (174.0 mph) in May 1995 and later reduced to 250 km/h (155.3 mph) again. Today, only a handful of ICE 1 services on the Nuremberg-Ingolstadt high-speed rail line reach 280 km/h (174.0 mph).Trainsets consist of two power cars (Class 401) and up to 14 intermediate cars (Classes 801 to 804).