These Kasseler Verkehrs-Gesellschaft (KVG) vehicules built by Alstom RegioCitadis in 2004 are dual voltage DC/AC tram-trains for use on the electrified network in and outside of Kassel. RBK712 & RBK714 are both heading away from Kassel Hauptbahnhof while the two units on the left are stabled in the sidings. The steep gradient down to the lower level and tunnel through onto the city centre streets is obvious.