Since the up-right-down-left configuration aligns with human habits, pushing the turn signal lever upward indicates a right turn, while downward is counterclockwise, interpreted as left. Upward is clockwise, understood as right. When using the turn signal, pay attention to the movement of your left hand fingers. While operating the lever, your left hand should not leave the steering wheel. Additionally, the turn signal will automatically reset, eliminating the need for manual resetting by the driver. As a signal light, the primary function of the turn signal during daily driving is to alert surrounding vehicles, indicating the driver's intention to turn or change lanes, prompting others to yield and avoid collisions. Therefore, whether turning, merging, overtaking, starting, or parking—whenever the vehicle needs to deviate from its current lane—the turn signal should be activated in advance. This is a fundamental principle of safe driving. The turn signal is a crucial indicator activated when a motor vehicle changes direction to alert nearby vehicles and pedestrians. It uses a xenon lamp tube controlled by a microcontroller circuit, alternating left and right flashes continuously. The turn signal employs a flasher unit to achieve blinking lights, which can be categorized into three types: resistance wire, capacitor, and electronic. Other lighting usage precautions During nighttime when streetlights are on, or when driving in low-visibility conditions such as fog, rain, snow, dust, or hail, the headlights, position lights, and taillights should be turned on. When turning, changing lanes, overtaking, making a U-turn, or pulling over, the turn signal should be activated 100 to 50 meters in advance. When a motor vehicle approaches a signal-controlled intersection and turns left, the turn signal must be activated, and low beams should be used at night. When a trailing vehicle is driving closely behind the preceding vehicle in the same direction, high beams should not be used. On roads without central barriers or centerlines, vehicles meeting at night should switch to low beams when the opposing vehicle is 150 meters away. On narrow roads or bridges, low beams should also be used when encountering non-motorized vehicles. When a motor vehicle passes sharp curves, slopes, humpback bridges, crosswalks, or uncontrolled intersections at night, it should alternate between high and low beams as a warning. If a motor vehicle breaks down or is involved in an accident on the road, obstructing traffic and making it difficult to move, the hazard warning lights must be activated, and a warning sign should be placed 50 to 100 meters behind the vehicle. At night, position lights and taillights should also be turned on simultaneously.
