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The Dutch city of Arnhem stil has them. Other cities, like Groningen, did away with them several years ago. In both cases the trolley lines were started directly after WWII - it was cheaper to just put up the wires than to put in new rails to replace the destroyed ones. <br />The Arnhem ones now utilize something like a flywheel, saving the energy that is lost when braking, to help it to get off again. <br /> <br />Check out http://members.shaw.ca/sfu/Arnhem_photos-2.htm amongst many others for pics.
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