Turn signals should be activated at least 3 seconds before changing the vehicle's direction. The specific operation varies by vehicle model, with the most common method being the control lever on the left side of the steering wheel: pushing up activates the right turn signal, and pushing down activates the left turn signal. Key application scenarios include: activating the turn signal in advance and checking the rearview mirror to confirm safety when changing lanes; turning on the left turn signal to alert the vehicle ahead before overtaking, and activating the right turn signal to return to the original lane after completing the overtake; activating the right turn signal in advance when exiting a roundabout, while no signal is required when entering. It is best to activate the turn signal 10 seconds in advance during nighttime driving to enhance visibility. The turn signal should remain on throughout the turning manoeuvre until completed, and in most vehicles, it will automatically turn off when the steering wheel is straightened. Incorrect usage such as sudden turn signal activation for lane changes or prematurely turning off the signal before completing a turn may lead to traffic accidents. Proper use of turn signals is not only a legal requirement but also a crucial safety measure for all road users.
