前方至少有多少米的距离无车时,才能超越前车?What is the least distance of clear road you MUST have in front of you when you have finished passing another vehicle?

前方至少有多少米的距离无车时,才能超越前车?What is the least distance of clear road you MUST have in front of you when you have finished passing another vehicle?
50米50 metres
100米100 metres
150米150 metres
250米250 metres

100米,这个数字需要死记硬背,没有需要特别解释的地方。可以用“100米无车,才能超车”来快速记忆