What are the rules for left turns at traffic light intersections?

[LePaislee]

Here are the rules for left turns at traffic light intersections: 1. If there is a dedicated arrow signal, you must follow its instructions. 2. In the left-turn waiting zone, when the straight-through signal is green and the left-turn signal is red, enter the waiting zone. You may proceed when the left-turn signal turns green. 3. If there is no dedicated arrow signal, left-turning vehicles may turn left when the straight-through signal is green, provided they do not interfere with oncoming straight-through traffic. 4. U-turns are permitted unless there is a no U-turn or no left-turn sign. Here are the functions of traffic lights: 1. They help vehicles and pedestrians cross intersections in an orderly manner. 2. They make travel more convenient, save significant time, and ensure the safety of life and property. 3. They effectively regulate traffic, manage traffic flow, improve road capacity, and reduce traffic accidents.

[Opal]

Having driven for over a decade, I've learned there's actually quite an art to making left turns. Simply put, you can only turn when the light is green, but you must yield to oncoming straight-moving vehicles and pedestrians first – if you cut in and cause a collision, you'll bear full responsibility. At some large intersections, there are specially marked left-turn waiting zones; when the straight-ahead light turns green, you can edge forward into this space to wait for your actual turn, which allows several more cars to get through. The worst move is darting out in the last few seconds of a green light and getting stuck in the middle of the intersection, leaving your car's rear end blocking cross traffic – that's called obstructing traffic! Also, don't take too wide a turn; keep it tight by hugging the inside of the central circle, and avoid swinging your wheel so hard that you end up in the opposing lane.

[BrooklynFitz]

As a driving instructor, it is essential to emphasize that left turns are a key focus in Subject 3. The textbook clearly states: When the light turns green, first observe the status of the traffic light and the left-turn arrow signal. If there is no arrow signal, you must completely yield to oncoming traffic. Do not turn the steering wheel too early; wait until the vehicle has fully crossed the stop line before gradually making the left turn, otherwise, you risk crossing the solid line. Pay special attention to the A-pillar blind spot during the turn—lean forward slightly to ensure visibility of electric scooters. Many trainees stop halfway on the crosswalk to wait for oncoming traffic, which is an illegal lane occupation! You must turn into the correct lane and wait there. During rainy conditions, reduce speed further when turning, as decreased tire grip increases the risk of skidding.

[VanEsther]

Last week, I was honked at by the car behind me while making a left turn at an intersection—I was actually watching out for pedestrians! Now, here’s the key point: Stopping at red lights and turning at green lights is the basic rule. Left-turn arrow signals are the most hassle-free; you can go as soon as it turns green. For regular green lights, you must ensure there are no pedestrians or vehicles crossing before proceeding. If necessary, stop behind the line and wait a few extra seconds. When turning, don’t just focus straight ahead—check your mirrors for bicycles and e-bikes, as they can suddenly dart out and give you a real scare. After completing the turn, remember to gradually straighten the wheel; jerking it sharply can easily lead to scraping the median. Beginners should move into the leftmost lane in advance to avoid last-minute lane changes that might cause scratches.

[DiSavannah]

From a traffic design perspective on left-turn rules: At intersections with a central island, vehicles must detour along the outer side (commonly known as making a big loop); at intersections with a second stop line, if the traffic light changes to red, you must stop before the second stop line. Grade-separated intersections often have dedicated left-turn lanes—forcing a turn from the wrong lane is both penalty-worthy and dangerous. Pay special attention to school zones: regardless of the traffic light, you must stop and yield to students crossing the street. When turning, avoid letting the inner wheels press on the central yellow circle, as that area is reserved for emergency U-turns by special vehicles. Always slow down when turning alongside large trucks, as their right-side blind spot can easily engulf an entire car.

[FrankMarie]

Those who have driven during rush hours know: making a left turn at an intersection without arrow signals is the most painful. When the light turns green, don't rush forward; wait until you confirm there's enough distance from oncoming straight-moving vehicles. What's a safe distance? Beginners are advised to count three seconds: if you see a straight-moving vehicle 100 meters away, don't force your way. When traffic is extremely heavy, it's better to wait for another traffic light cycle than to squeeze in. If the light turns red during your turn, you can continue as long as your car has crossed the line, but staying on the intersection grid line will cost you 3 points! In rainy or foggy weather, besides slowing down, you must also turn on your fog lights. Last time I didn't turn on my fog lights while turning, the car behind almost rear-ended me.