What is a left-turn waiting zone?

[StCecilia]

Left-turn waiting zone refers to the area where vehicles in the left-turn lane must advance when the straight-through lane in the same direction has a green light, waiting for the signal. The left-turn lane is extended with several meters of white dashed-line boxes that connect directly to the middle of the road. These white dashed boxes mark the designated left-turn waiting zone. Roads implementing left-turn waiting zones are mostly one-way roads with three or more lanes. According to each traffic signal cycle, it is estimated that 3 or 4 additional vehicles can pass per cycle, increasing traffic flow by approximately 100 vehicles per hour. This effectively enhances the intersection's vehicle throughput and reduces vehicle congestion.