SPL (Siemens Powerlines) KL X 934 009-2 (Montageturmwagen). This small
vehicle with a work platform and a measurement pantograph weighs 3.2 t,
and has an own drive so that it can go up to 20 km/h on building sites.
It cannot be part of a train though, as it has no regular coupler. 
Photographed on a siding at Graz-Puntigam. 2003-03-14.
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photo: <a href="mailto:tbk@uncia.de">tobias b k&ouml;hler</a>