You want to turn left ahead. In the middle of the road there is a lane marked as shown. You must

You must merge completely into this lane before you make your left turn.

This is important because the lane is specifically designated for turning left, allowing you to position your vehicle safely and prepare for the turn. Merging into the turn lane helps to separate you from oncoming traffic and ensures that your turn can be executed smoothly and safely. Always remember to check for pedestrians and other vehicles before making your turn.