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The Ultra Low Floor tram (ULF) is a low-floor tram operating in Viennamarker, Austriamarker and Oradeamarker, Romaniamarker, with the lowest floor-height of any such vehicle. In contrast to other low-floor trams, the floor in the interior of ULF is at sidewalk height (about 18 cm or 7 inches above the road surface), which makes access to trams easy for passengers in wheelchairs or with baby carriages. This configuration required a new undercarriage. The axles had to be replaced by a complicated electronic steering of the traction motors. Auxiliary devices are installed largely under the car’s roof.

The ULF technology went into testing in the early 1990s. Since 1998, ULFs have been in use on Vienna's tram networkmarker, built by a consortium composed of Siemens and Elin in Vienna. As of mid-2008, 302 cars were in operation (150 cars since mid-2006, and another 152 as of 2007).

Siemens ULF trams were introduced in Oradeamarker, Romaniamarker on 24 April 2008.

Technical Specifications

City / Operator Type designation Built in Number of vehicles Length Width Weight (empty) Maximum power
Viennamarker, Austriamarker/Wiener Linienmarker A 1995 (prototype), 1997 50 24.20  2.40  30 t 6 x 60 kW
Viennamarker, Austriamarker/Wiener Linienmarker A1 2007– 80 24.20  2.40  30 t 6 x 36 kW
Viennamarker, Austriamarker/Wiener Linienmarker B 1995 (prototype), 1998 100 35.30  2.40  43 t 8 x 60 kW
Viennamarker, Austriamarker/Wiener Linienmarker B1 2009– 70 35.30  2.40  43 t 8 x 36 kW
Oradeamarker, Romaniamarker/ OTL A1 2008–2009 10 24.20  2.40  30 t


Notes

  1. [1] Railway Gazette International: Oradea orders export ULF 05 Feb 2008


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