What are the rules for two lanes merging into one lane?

[McGage]

According to Article 53, Paragraph 3 of the 'Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China': At intersections or road sections where lanes are reduced, if motor vehicles ahead are stopped in queues or moving slowly, vehicles from each lane shall take turns to enter the reduced lane alternately, one vehicle per lane at a time. Below is an introduction to traffic signals: 1. Function of traffic signals: Traffic signals are lights that direct traffic flow, typically consisting of red, green, and yellow lights. A red light indicates prohibition of passage, a green light indicates permission to proceed, and a yellow light serves as a warning. 2. Classification of traffic signals: Traffic signals are categorized into motor vehicle signals, non-motor vehicle signals, pedestrian crossing signals, directional indicator signals (arrow signals), lane signals, flashing warning signals, and level crossing signals for roads and railways.