What is the proper way to use turn signals?

Proper use of turn signals must follow the "up for right, down for left" principle: pushing the lever upward activates the right turn signal, while pushing it downward activates the left turn signal, and the operation should be performed 3 to 5 seconds in advance in different driving scenarios. When changing lanes, the corresponding turn signal must be turned on in advance according to the direction-for example, turn on the left turn signal when changing lanes to the left, and complete the manoeuvre after checking the adjacent lane to ensure safety; turn on the left turn signal before overtaking, and after completing the overtaking, turn on the right turn signal to return to the original lane. When turning, the turn signal should be activated about 30 meters before the intersection-use the left turn signal for left turns and the right turn signal for right turns. When entering or exiting an expressway, turn on the left turn signal before merging into the main road, and turn on the right turn signal when exiting. Turn on the right turn signal when pulling over to the side of the road, and turn on the left turn signal and check the rear road conditions when starting off. Turn signals are an important communication tool between vehicles; their standardized use can significantly enhance driving safety and avoid traffic accidents caused by unclear signals. Drivers should develop the good habit of turning them on in a timely manner, operating them accurately, and turning them off after use.