中文摘要：

为降低高速公路货车超限率，保障高速公路的正常运行和交通秩序，计重收费政策在已在我国推广应用．本文在国内外高速公路计重收费政策研究基础上，以黑龙江省2011年11月15日计重收费费率下调为背景，结合瓦盆窑收费站的实际交通运行数据，计算了费率下调前后超限货车的价格弹性，采用理论推导与数据分析相结合的方法研究了计重收费政策下超限货车用户的行为，并提出了相关的计重收费政策实施建议，为高速公路计重收费政策在我国的健康发展提供参考．

英文摘要：

To reduce the freeway trucks＇ overloading rate and ensure the freeway＇ s normal operation and transportation order, the policy of toll by weight has been applied in China for years. Based on the domestic and international study results on freeway toll by weight, this paper takes the rates of toll by weight decrease in Heilongjiang Province of China on November 15,2011 as the case study. With the traffic operation data of Wapenyao toll plaza, this paper calculates the price elasticity of overloading truck before and after the toll rates decrease, adopts a combination of theoretical derivation and data analysis to discuss overloading truck users＇ behavior under the policy of toll by weight. It then puts forward some recommendations on the implementation of toll by weight, which provides the reference for the healthy development of freeway toll by weight.