The traffic signal optimization is the most difficult one of intelligent transportation control.

交通信号优化是智能交通控制中的难点。

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Thess models have advantages to carry on the traffic control signal optimization and the traffic jam mechanism analysis. Furthermore, it is easily for the computer software realization.

该模型具有既能够进行交通控制信号优化与交通阻塞机理解析应用，又便于计算机软件实现的优点。

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In this paper, the urban traffic signal control were mainly researched, the methods of coordinated optimization control for urban trunk road were discussed in depth.

本文以城市干线作为出发点，对城市交通信号控制展开研究，重点对城市干线协调优化控制的方法进行了深入研究。

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