Urban road traffic system, which integrates human, vehicles, roads, environment and other complex factors, is of high complexity, time-dependence and randomicity.

城市交通系统集成了人、车、路和环境等各种因素，具有高度的复杂性、时变性和不确定性。

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The advanced urban traffic signal control system has an important effect on improving the traffic condition and sufficiently utilizing roadway capacity of the existing road.

先进的城市交通信号控制系统对改善交通状况，充分利用现有道路的通行能力起着重要作用。

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Road traffic signal controller is an important device in urban traffic signal control system.

道路交通信号控制机是城市道路交通信号控制系统中的重要设备。

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