In 2001, 273 cities conducted noise monitoring on the road traffic, with 59 ones over the previous year.
2001年，273个城市进行了道路交通噪声监测，比上年增加了59个城市。
Through field monitoring, the variation laws of road traffic flow, vehicle speed and vehicle type are analyzed, as well as the relationship between road noise and traffic condition.
通过实地监测，分析了某干道车流量、车速、车型的变化规律及其与道路噪声的相互关系，并对选择的交通噪声预测模型进行了精度检验。
Through field monitoring, the variation laws of road traffic flow, vehicle speed and vehicle type are analyzed, as well as the relationship between road noise and traffic condition.
通过实地监测，分析了某干道车流量、车速、车型的变化规律及其与道路噪声的相互关系，并对选择的交通噪声预测模型进行了精度检验。
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