A government study recommended a national highway system of 33,920 miles, and Congress passed the Federal-Aid Highway Act of 1944, which called for strict, centrally-controlled design criteria.
一项政府研究建议建设一个33,920英里的全国公路系统，国会通过了1944年的《联邦援助公路法案》，该法案要求制定严格的、集中管控的设计标准。
Because the line is controlled by persons, errors are easily produced in the vertical direction, causing errors of the highway line and width.
由于人工掌握路线，竖直方向容易产生误差，进而引起公路线形和宽度有误差；
In the construction of the highway project, the highway line is generally controlled by the middle stakes and the width of highway is measured with a steel ruler from the middle stakes to both sides.
公路工程施工中，公路线形一般由中桩控制，公路宽度是用钢尺自中桩向两侧丈量。
In the construction of the highway project, the highway line is generally controlled by the middle stakes and the width of highway is measured with a steel ruler from the middle stakes to both sides.
公路工程施工中，公路线形一般由中桩控制，公路宽度是用钢尺自中桩向两侧丈量。
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