
When merging from a slip road to a main road, the left turn signal should be used. It is important to note that turn signals must always be used when entering a main road from a slip road. Using turn signals communicates your driving intentions to vehicles behind you and helps prevent accidents. When merging from a slip road into a main road, not only should you use your car's turn signals, but you should also carefully observe the traffic conditions behind you on the main road. Only when you are certain there are no vehicles on the main road should you slowly merge into the main lane. Generally speaking, while driving, you should check your mirrors, but be aware that mirrors have blind spots. If you cannot be sure whether there are vehicles in the blind spot, you can check the interior rearview mirror or turn your head to look directly to ensure safety when changing lanes.

I've been driving for decades. When entering the main road from an auxiliary lane, my main focus is on the traffic lights of the main road. Those are the primary signals - green means go, yellow means prepare to stop, and never run a red light. There might be no light or just a small one on the auxiliary lane, don't get distracted by it. I remember at highway entrances, merging from the auxiliary lane to the main road is particularly critical. If the main light is red and you force your way through, it's easy to cause an accident or get caught by cameras. So before entering the main road, take a quick glance at the rearview mirror to ensure no car is closely following, then slow down at the intersection, and wait for the main light to turn green before starting steadily. Many people often overlook this, rushing in just by seeing the auxiliary lane's green light, ending up with tickets or scratches. Safety first when driving, don't try to save time by cutting corners.

As an experienced driver, I'm accustomed to observing before entering the main road. The traffic lights on the main road are the main indicators - regardless of whether the auxiliary road has lights or not, you must follow the main road's traffic signals. This is especially important when turning left or right onto the main road, where you need to pay attention to the main road's dedicated arrow signals for turns. When the yellow light flashes, quickly assess whether you can proceed or need to stop. Sometimes auxiliary roads have their own small traffic lights, but these only control the auxiliary road's access and don't affect main road traffic. Timing is crucial when entering the main road - don't hesitate after the light turns green to avoid honking from vehicles behind you. Also watch for pedestrian signals, as some crosswalks are right next to intersections. For safety, make it a daily driving habit: always check the main road's traffic lights before entering.

When entering the main road, the traffic lights on the main road are the key checkpoint. Sometimes there are no lights on the auxiliary road, or there are lights but they only serve as signals for the auxiliary road. Don't confuse them—focus directly on the traffic lights at the main intersection. If there's a stop line on the auxiliary road, come to a complete stop first, and then proceed slowly when the main light turns green. From a safety perspective, this action helps prevent rear-end collisions and accidents. Never take a chance and run a red light—it's not only dangerous but also risks points deducted by traffic police if caught. If the yellow light is flashing, don't rush; stop steadily and observe. New drivers often cause chaos by only watching the auxiliary road lights and rushing into the main road, so practice multiple times to develop the instinct: the main light controls everything.


