全球的市场压力使得重载铁路运输收入越来越少，而且激烈的市场竞争还要求不断地压低运价，这迫使经营者不得不通过技术革新这一行之有效的途径来降低成本。本文以美国铁路协会所属的运输技术中心进行的大轴重项目试验结果为例证，探索了轨道材料和转向架的技术改进给成本节约带来的经济效果。 Global market pressures have led to less and less heavy-haulage railway transport revenues. Moreover, fierce market competition has also demanded continual tariff reductions, forcing operators to reduce costs through an effective approach to technological innovation. This paper takes the test result of large axle load project conducted by the Transportation Technology Center affiliated to the American Railway Association as an example to explore the economic benefits brought by cost saving due to the technical improvement of track materials and bogies.