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Railroad electrification in the United States
Railroad electrification in the United States began at the turn of the 20th century and comprised many different systems in many different geographical areas, few of which were connected. Despite this situation, these systems shared a small number of common reasons for electrification.
Most of the systems discussed in this article are either no longer electrified, or are now part of the Northeast Corridor and Keystone Corridor systems used by Amtrak and several commuter rail lines. One exception is the Black Mesa and Lake Powell Railroad, an isolated system hauling coal from a mine to a power plant. Most mass transit, streetcar and interurban systems electrified very early—many from the beginning—but are not within the scope of this article.
==Impetus for electrification==
The common reasons for electrification in the United States include:
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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