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Your road currently has a 50 km/h limit. A 70 km/h sign is ahead. Assuming your vehicle has no lower limit and conditions are safe, when may you begin accelerating above 50 km/h?
當前路段限速每小時50公里，前方有70公里限速牌。假設車輛沒有更低限速且路況安全，何時才可開始加速超過50公里？
The higher limit takes effect at the sign. Keep within 50 km/h until you have passed it.
較高限速從標誌處開始生效；駛過該標誌前仍須保持在每小時50公里以內。
閱讀相關知識
A higher posted limit is permission up to a maximum, not a requirement to accelerate. Lower vehicle limits and unsafe weather, traffic or road conditions still govern your speed.
較高限速只是允許的上限，不要求加速。車輛自身較低限速以及天氣、車流和道路安全條件仍須遵守。