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You are travelling in a 70 km/h area and approaching a 50 km/h sign. With no emergency or contrary direction, which plan is correct?
你正行駛在每小時70公里限速區，前方出現50公里限速牌。在沒有緊急情況或另行指揮時，哪種做法正確？
Prepare early and reach the lower limit by the sign; the new limit is not a grace period for slowing down afterwards.
應提前準備，到達標誌處時就符合較低限速，不能把駛過標誌後的路段當作減速寬限區。
閱讀相關知識
Observe the road and traffic behind, ease speed down safely and choose an even lower speed if conditions require it. The number on a compulsory sign is a maximum, not a target.
觀察道路和後方交通，安全平穩地減速。路況需要時應更慢；強制限速牌上的數字是最高速度，不是必須達到的目標。