When the left turn signal turns red after a vehicle enters the waiting area, it should continue to pass through, as it has already crossed the stop line and does not count as running a red light. However, the vehicle must not stop in the waiting area. In some high-traffic urban intersections, traffic signals alone are insufficient to manage the flow of vehicles effectively, leading to the introduction of additional markings. For example, the left-turn waiting area is a type of traffic marking that has become popular in recent years. Its purpose is to allow more vehicles to pass through during a single signal cycle. The "left-turn waiting area" is specifically designated at intersections with relatively wide roadways and multi-phase traffic signals. Once a vehicle has entered the waiting area, it must continue driving as long as the straight-through signal is green. Otherwise, it constitutes a traffic violation. In other words, as long as the straight-through signal is green, all vehicles in the waiting area must proceed, regardless of the color of the left-turn signal. The goal is to ensure the intersection remains clear and avoids congestion. If the straight-through signal is red after a vehicle has entered the waiting area, the left-turn lane signal takes precedence. If the left-turn signal is green, the vehicle may proceed; if it is red, the vehicle must not proceed. Only when the straight-through signal is green and the left-turn signal is red can vehicles outside the stop line enter the waiting area. Once the red light turns on, vehicles must not enter the waiting area, or it will be considered a violation—running a red light.
