I’ve visited Calgary a few times but been over a decade now, one time I recall a turn lane being backed up like a km before the turn, was probably rush hour for that direction so maybe not overly usual, though I wasn’t there long enough to find out. What I saw back then was a need for better planning of roads but guess they make do with what they have. This may be completely irrelevant to the entire issue but figure if they lack on some road planning expands to other areas.