Urban traffic is an important branch of transportation system. Traffic control, especially control of traffic signal light is a dominating part of urban traffic research.
城市交通是交通系统的重要组成部分，交通控制，特别是交通信号灯的控制是城市交通研究的主要内容。
Urban traffic is an important branch of transportation system. Traffic control, especially control of traffic signal light is a dominating part of urban traffic research.
城市交通是交通系统的重要组成部分，交通控制，特别是交通信号灯的控制是城市交通研究的主要内容。
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