Re: Leaves on Melbourne tracks
  Bramley

Here's a photo of a track cleaning tram in Helsinki I took a week ago.
I would think using a truck is more flexible than a tram, because it can move out of the way to let revenue trams pass (something I often see happening in Melbourne). One reason Helsinki prefers a tram may be to deal with snow - a truck driver may lose track of the rails if the road is covered in snow - as it was a few days previously.
http://tdu.to/Bram_helsinki_scrubber_12-05-17.jpg
Bramley.Just back from a trip from Beijing to Helsinki via the Trans-Siberian railway!

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bram helsinki scrubber 12-05-17  |  1920W x 1238H  | 710.82 KB |  Photo details