Is it necessary to use turn signals when changing lanes at an intersection?

[Finley]

It is necessary to use turn signals. The purpose is to alert other vehicles that you are preparing to change lanes. Turn signals are activated when the vehicle is turning, flashing intermittently to draw attention from surrounding vehicles and pedestrians. The timing for activating turn signals should be well controlled, ideally turning them on when you are about 10 to 30 meters away from the intersection. Additional explanation: When changing lanes: You should signal in advance. While changing lanes, pay attention to vehicles behind you and avoid changing lanes twice consecutively. When overtaking: Overtake from the left side of the vehicle in front, so first activate the left turn signal, accelerate to overtake, and when returning to the driving lane, follow the lane-changing procedure by activating the right turn signal. When overtaking at night: In addition to correctly using turn signals, before overtaking, continuously switch between high and low beams to signal the vehicle in front to yield.