單選題 · 選擇一個答案
What does the yellow traffic-signal warning sign on the left mean?
圖中左側黃色交通信號燈警告牌表示什麼？
Traffic signals are ahead: observe them and prepare to stop as required.
前方有交通信號燈，應觀察信號並準備按要求停車。
閱讀相關知識
The warning neither fixes their distance at 50–100 metres nor says they are faulty.
警告牌提示前方危險或交通控制，不單憑該圖案保證信號燈必在50至100米處，也不表示信號燈已經故障。