| 1. | In addition , considering traffic security , operational efficiency and people ' s travel habits , the setting of signal phases must satisfy strong constraints , such as maximum and minimum green time , maximum queue length and smooth switch of signal timing parameters
并且，从交通安全、通行效率及人们出行习惯的角度考虑，信号灯相位的设置具有很强的约束，如最短和最长绿灯持续时间、最大排队长度以及信号灯的配时参数要具有一定的稳定性不能变化太剧烈等等。 |
