You are turning left, and the driver coming the other way is also turning left. You meet in the middle of the intersection. How should the two of you pass each other?

Correct answer: D. Each turns to the left of the other, passing behind rather than in front

Each of you turns to the left of the other — that is, you pass driver's-side to driver's-side, going around behind one another rather than crossing in front. The Handbook puts it as: "When two vehicles coming from opposite directions meet in an intersection waiting to turn left, each should turn to the left of the other after yielding the right-of-way to pedestrians and oncoming traffic." The advantage is sightlines: turning in front of each other means each car briefly blocks the other's view of any vehicle coming straight through, which is exactly the traffic you both still have to yield to. Note the order in that sentence — pedestrians and oncoming traffic first, then each other.

Source: MTO Driver's Handbook: Changing directions — Left turns, two vehicles meeting to turn left