I'm also option C in most cases, as I find typical they block off much more area than needed for what they are actually doing. But if there isn't clear inside the cones, then of course you have to use the lane fully. But more often traffic is backed up and I am zooming inside the cones so have to be a little cool about merging into the lane since seeing a cyclist move faster than cars can be a trigger for some folks out there.
scott s.
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