Before you may turn left at an intersection, you must yield to
- oncoming vehicles. ✓
- vehicles coming from the left.
- vehicles coming from the right.
- vehicles from behind.
Answer: A. oncoming vehicles.
Before you turn left at an intersection, you must yield to oncoming vehicles.
Why this is the answer
The handbook says not to assume you have the right-of-way and to turn only when it can be done safely, with your path clear of other traffic. Its intersection example describes a turning driver who must yield the right-of-way and wait until the other vehicle has gone through before turning. Applying that to a left turn, you wait for approaching traffic that is already coming toward you before you cross its path.
Why the other answers are wrong
- B. vehicles coming from the left. — Yielding only to vehicles coming from the left is too narrow; the handbook tells you to give way to traffic that has the right-of-way and turn only when your path is clear, not just to one side.
- C. vehicles coming from the right. — Yielding only to vehicles coming from the right is also too narrow; the handbook's guidance is to yield to traffic already proceeding and make the turn only when it is safe.
- D. vehicles from behind. — Traffic from behind is not what you wait for before a left turn; the handbook points you to the traffic already proceeding through the intersection and to a clear path.
Remember it
Before you turn left, look across the intersection and let the other vehicle finish its path first: clear path, then turn.
Official handbook: ICBC Driving Commercial Vehicles, 3 Basic driving skills – Crossings, p. 51