Final answer:
When turning, wait until you see the entire rear end of the vehicle you have just passed in your rear view mirror.
Step-by-step explanation:
When turning, it is important to wait until you see the entire rear end of the vehicle you have just passed in your rear view mirror. This ensures that you have enough space to safely complete your turn without cutting off the vehicle behind you.
For example, if you are driving on a road and you pass a car, you should wait until you can see the entire back of that car in your rear view mirror before you start turning. This way, you can be confident that you have enough distance and time to make the turn safely.