Wiener Linien ULF A 57 "EcoTram".
This is an experimental project testing ways of saving
energy for heating, ventilation and air conditioning. The
number of passengers is measured and the power of the
air conditioning system adjusted accordingly.
Wien Meidling/Philadelphiabrücke, 2014-02-16.
<p>
<a href="mailto:tbk.uncia@gmail.com">tobias b k&ouml;hler</a>