Ultra Low Floor

The Ultra Low Floor tram (ULF) is a low-floor tram operating in Vienna, Austria, and Oradea, Romania, built by a consortium composed of Siemens and ELIN in Vienna.

In contrast to other low-floor trams, the floor in the interior of ULF is at sidewalk height (about 20 cm or 7.9 inches above the road surface), which makes access to trams easy for passengers in wheelchairs or with baby carriages.

The axles had to be replaced by a complex electronic steering of the traction motors.

Auxiliary devices are installed largely under the car's roof.

Siemens ULF trams were introduced in Oradea, Romania, on 24 April 2008, and are the only ULF trams outside Austria.