主要街道上的绿灯时间比小街道上的长。

The traffic on the main streets has a longer green signal than that on the small ones.

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在充分考虑信号交叉口混合交通特性的基础上，提出了信号交叉口周期时长、绿信比、绿灯时间间隔优化模型。

Considering the mixed traffic running characteristic on signalized intersection, this paper sets forth optimized cycle time, green ratio and green light interval model.

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与传统行人相位设计方法的对比分析表明这种行人相位设计方法缩短了行人过街最短绿灯时间，降低了过街人均延误。

The comparison of the method and the traditional design method of pedestrian phases demonstrates the new method can shorten the minimum green time, and reduce pedestrian delay.

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