On roads of arterial standard and above, traffic calming is never appropriate because they require higher Design Speeds.
干线和以上标准的道路上不适合进行交通稳静化，因为它们要求较高的计算行车速度。
On roads of arterial standard and above, traffic calming is never appropriate because they require higher Design Speeds.
干线和以上标准的道路上不适合进行交通稳静化，因为它们要求较高的计算行车速度。
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