
Usage of turn signals: 1. The left turn signal should be activated in advance when making a left turn, changing to the left lane, preparing to overtake, leaving a parking spot, or making a U-turn; 2. The right turn signal should be activated in advance when making a right turn, changing to the right lane, returning to the original lane after overtaking, or parking by the roadside; 3. When entering a highway from an on-ramp, the left turn signal should be activated and the vehicle should merge into the lane without obstructing the normal flow of traffic already on the highway. Turn signals are crucial indicator lights that alert surrounding vehicles and pedestrians when a motor vehicle is about to change direction. The turn signal bulbs use xenon tubes with microcontroller-controlled circuits that enable alternating left-right flashing without interruption. Turn signals employ flashers to achieve the blinking effect, which can mainly be categorized into three types: resistance wire type, capacitor type, and electronic type.

As a veteran taxi driver with over a decade of experience, I've seen too many people misuse turn signals. Those red and yellow lights aren't just decorations - they dictate the rhythm of the entire road. You must signal at least three seconds before changing lanes to give following vehicles adequate reaction time. Roundabouts require special attention: use your left signal when entering to indicate you're taking the inner lane, and right signal when exiting to alert outer lane vehicles. Nothing's more infuriating than private cars cutting in for right turns without signaling, forcing emergency stops that nearly slam my face into the steering wheel. Even when parking and opening doors, activate the corresponding turn signal first - especially after rain when water droplets obscure side mirrors, those amber lights become crucial for spotting approaching electric bikes. Remember, turn signals are your language for communicating with others on the road.

Novice drivers often ask me when to use turn signals, but the key points can be summarized in two sentences: You must signal whenever your vehicle is about to change its trajectory. While basic maneuvers like left or right turns are obvious, there are some easily overlooked scenarios. For example, when pulling out from the roadside, first activate your left turn signal and check behind you before moving off—don't just dart out. When merging from an auxiliary road onto a main road, signal at least 50 meters in advance to give main road traffic adequate reaction time. Even when reversing out of a parking space, use your turn signals, and in rainy or foggy conditions, engage hazard lights earlier for enhanced visibility. Last time in my residential area's narrow lane, an oncoming car proactively signaled right to yield—such small courtesies truly prevent many fender benders.

The core logic of using turn signals is simple: activate the signal whenever the wheels deviate from the current straight direction. Right-angle turns, lane changes, and overtaking go without saying—even during consecutive lane changes on the highway, you must signal again for each lane change instead of keeping the signal on throughout. A special reminder for nighttime overtaking: first turn on the left signal to alert the car ahead, then switch to the right signal after completing the maneuver to return to the original lane. Don’t slack off when encountering traffic police directing traffic either; even if their gestures are clear, adding a turn signal is safer. Once, I saw a car suddenly brake at an exit ramp without signaling, causing a chain-reaction rear-end collision that showered my car with glass shards—a bloody lesson indeed.

When learning to drive, the instructor said that turn signals are the baton of civilized driving. They're not just for turning; when you move from a straight lane into a left-turn waiting area, turning on the left signal tells those behind you that you're changing position. On a two-way, two-lane road, when overtaking with no oncoming traffic, signal left, accelerate to pass, then turn off the signal after returning to the right lane. Use turn signals when entering or exiting gas stations, and even more so when looking for a parking spot in a lot. Those who rush around in garages without signaling are most likely to hit people pushing shopping carts. Remember, signaling in advance isn't just to avoid traffic cameras—it's to let all surrounding traffic participants know your plan.

Here are some practical scenarios: At a T-junction, you must signal right when turning right, even if there's no dedicated right-turn lane. U-turn spots often have dashed-solid lines; check carefully and signal left 200 meters in advance. When passing an unmarked crosswalk without traffic lights, if the car ahead suddenly signals right, it means someone is yielding to pedestrians. In rainy weather, I habitually flash my turn signal twice more before turning, as fog can reduce light penetration. On highways, be extra cautious when exiting; signal right 500 meters before the ramp, as many rear-end collisions occur at forks due to sudden braking. The moment the turn signal lights up, it's like pressing the pause button for the entire road, giving everyone time to prepare to yield.


