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You approach a crash site marked by a police CRASH or ACCIDENT warning sign. What speed must you use until you have passed the site?
接近警方以CRASH或ACCIDENT事故警告牌标示的现场时，直到驶过现场前，应采用什么速度？
Travel at 20 km/h or less and be ready to stop.
每小时20公里或更低，并随时准备停车。
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Keep that low speed until past the site, watching rescuers, casualties and obstructions. The limit is not a target.
事故现场可能有救援人员、伤者或路障，需保持低速直到驶过现场。20公里是这一警告场景的上限，不是任何条件下都应达到的目标速度。