Possibly years ago, somewhere else on c2e, I mentioned that in construction zones, accident areas, etc. people should 'merge at the barrier/sign and not before' because early mergers essentially get pushed back further and further by those that drive past the forming flow through lane and get in ahead of them.
Well, on CBC radio this morning, there was a piece about needing to educate Edmontonians about how to merge properly and they called it "zipper" merging. That in some countries it's the law... Check CBC radio for videos - they say they are posting them.
Note: just two days ago I pulled off the Anthony Henday and followed the road onto 87th ave east bound right into road construction. Traffic was backed up right over the overpass in the inside(left) lane. I drove in the empty merge lane past waiting and early merging cars then down the empty right lane, right up to the merge sign and then waited for someone to let me in. Five or six cars deliberately / aggressively prevented any opening from forming to let me merge at the sign, possibly because they'd already let loads of cars get in, in front of them or they themselves had merged too soon.
What I hate though is people that drive on the shoulder to get past waiting cars. However, it's often too bad that two lanes don't form where the shoulder could be used to get around an obstacle, say an accident on the highway.
I think the should use "Merge at the Barrier" or "Merge at the Sign" for planned lane closures.