图中左侧的黄色交通信号灯是什么意思?What does the yellow traffic light on the left mean in the picture?

图中左侧的黄色交通信号灯是什么意思?What does the yellow traffic light on the left mean in the picture?
存在前方50-100米的交通信号灯,请注意遵守信号灯指示There is a traffic signal 50-100 meters ahead, please pay attention to follow the signal instructions.
前方信号灯损坏,小心驾驶通过路口There is a damaged traffic light ahead, please drive carefully through the intersection.
前方有铁路交叉,请注意火车There is a railway crossing ahead, please be careful of trains.

当看到该黄色交通信号灯时,表示前方50至100米有交通信号灯控制的路口,提醒驾驶员注意并遵守信号灯。