单选题 · 选择一个答案
You're driving at 100kph and see an accident sign. What speed must you slow down to?
你正在以100公里的时速前进时看到了道路事故标识，你应该马上将车速降到？
Slow to 20 km/h or less at the police accident sign, maintaining that until past the site.
看到警方事故警示牌，应降至每小时20公里或更低速度，直到驶过事故现场。
阅读相关知识
People, obstructions, visibility or police directions can require slower travel or a stop. Slow smoothly and watch casualties and rescuers.
20公里是上限，现场人员、障碍、视距或警方指挥可能要求更慢或停车；应平稳减速并留意伤者及救援人员。