Approximately 6,860 signal and track switch repairers are employed in the United States. Signal mechanics may be employed by passenger lines or freight lines. They may work for one of the major railroads, such as BNSF Railway Company, Norfolk Southern, or CSX Corporation, or they may work for one of the 500 smaller short-line railroads across the country. Many of the passenger lines today are commuter lines located near large metropolitan areas. Signal mechanics who work for freight lines may work in rural or urban areas and travel more extensively than the shorter, daily commuter routes passenger railroad conductors make.
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