traffic light signal

• 交通灯号

traffic light signal的用法和样例：

例句

1. First, researchers found that violations dropped by 36 percent after yellow lights were extended to give drivers more warning that the light was about to turn red.
   首先，研究人员发现，在延长黄灯时间以便给驾驶更多注意灯号即将转红的预警时间后，闯红灯违规事件减少了百分之三十六。