随着经济的快速发展和物资的快速流通,越来越多的物资需要在城市、城间甚至国际间实现运输。货物运输一方面促进了地区经济的快速发展,同时,也不可避免地带来了一些负面影响,即由货物运输而带来的诸如环境污染、交通拥挤以及交通事故等外部不经济性。这种由货物运输产生的外部? With the rapid economic development and rapid circulation of materials, more and more goods and materials need to be transported in cities, cities and even in the world. On the one hand, the transportation of goods promotes the rapid development of the regional economy and at the same time, it inevitably brings some negative impacts, such as the external diseconomies brought by the transportation of goods, such as environmental pollution, traffic congestion and traffic accidents. This external generated by the transport of goods?