By 1860 there were thousands of miles of railroads crossing the eastern mountain ranges and reaching westward to the Mississippi.
由1860年有数千公里长的铁路穿越东部山脉和深远向西密西西比河。
Article 27 warning lights, warning signs or protective safety facilities shall be put up at the level crossing of railroads and roads.
第二十七条铁路与道路平面交叉的道口，应当设置警示灯、警示标志或者安全防护设施。
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