You make the case exquisitely. "Acceleration lanes" exactly captures the dilemma. And the vast majority of motorists (and cyclists!) fail to indicate their turn when entering those lanes. As a cyclist, I find it necessary to signal I'm *not* turning right, ambiguous, but since almost every motorist presumes you're headed onto a #4xx Highway (WTF?) it's necessary to point out the obvious to them. It's a deadly dangerous game.
View attachment 149608
I'm sorry to go against well-intended posters, but this depicts a very dangerous situation *more dangerous* in ways, than just sharing the road. Why? Because those cyclists are sitting ducks with absolutely no protection, no idea what's coming up behind them, and a very false sense of safety. I can tell just looking at their body English they're almost or completely unaware of the dangers.
Just ask a Dane of Nederalander what this picture represents. Fail! Big Time. At least give them a concrete barrier. Not every motorist, but I'd say for the sake of argument one in ten will pull into that lane with no sense of consequence, and in some cases, with a sense of entitlement.
These types of lanes have been proven killers time and again in Ontario.
I don't know the latest iteration of this in Guelph, but they had some very serious accidents on this stretch, and in this pic, they've actually removed the 'cycle' symbols:
View attachment 149609
https://www.google.ca/maps/@43.5237...4!1sikBz07dBLZVGh9GEwEdoNg!2e0!7i13312!8i6656
I'll try and find the news stories behind it and post.