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日前,从北京市交通委了解到,为保障奥运会期间的交通顺畅,北京市将采取措施保障北京一般道路的车速不低于每小时20公里,城市道路快速
Recently, the Beijing Municipal Commission of Transportation learned that to ensure smooth traffic during the Olympic Games, Beijing will take measures to ensure that the average speed of roads in Beijing is not less than 20 kilometers per hour, and the speed of urban roads