《轨道安全标准》（《联邦法典》第14卷第213部分）根据最大容许速度，就九个等级的铁轨明确了要求。
The Track Safety Standards (49 CFR Part 213) specify requirements for nine classes of track based on maximum allowable speed.
这条铁路将采用电力作为动力，两条铁轨之间的距离也与之前的标准完全不同，因此被称为“新干线”。
The railway will use the power the power, the distance between the two tracks and the standard before completely different, so called "Shinkansen".
这条铁路将采用电力作为动力，两条铁轨之间的距离也与之前的标准完全不同，因此被称为“新干线”。
The railway will use the power the power, the distance between the two tracks and the standard before completely different, so called "Shinkansen".
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