参考
交通标志库
复习理论备考中常见的警告、管制和指路标志。
When there is a traffic police directing the flow of traffic, his instructions override_____
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正确答案为什么对：
本题考查什么
For the question "When there is a traffic police directing the flow of traffic, his instructions override_____", the correct answer is "Both A & B" because whenever there is a policeman directing the traffic flow, his/her instruction shall override the road marks, traffic signs and signals.
官方来源： Singapore Police Force Online Learning Portal: Basic Theory of Driving
主题
信号与交通灯
交通灯顺序、绿色箭头、手势信号、转向灯，以及交警指挥交通。
道路知识
理论考试指南
在下一轮练习前，复习考试顺序、临时驾照时间和学习结构。
罚则
记分制（DIPS）
把规则知识与真实驾驶中重要的门槛和违例类型对应起来。