First of all, the street cleaner...i.e. the mechanized one...is the one in the back, mostly out of the frame. But the REAL street cleaners are the guys that prepare the way, utilizing this water "cab," for lack of a better word.
I've never seen this done anywhere else (well, not in Germany or America, that is). The guys go along the sidewalks and in-between parked cars/bikes to lightly pressure-spray all the debris onto the road. The big monster then comes and gobbles it all up!
[Today I'm in Amsterdam.]
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