OH! And for you "blokes" across the pond and where you ride your motorcycles on the "wrong" side of the road and still insist on spelling certain words in this somewhat shared language of ours with that OH so needless superfluous letter 'u', THIS would of course be known to YOU as "filtering".
(...well, at least this is what I've heard the nomenclature would be over there and about this whole "controversial" lane-splitting issue, anyway)
