Switch heaters at a major rail hub in New York - GIF

Switch heaters at a major rail hub in New York.

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Previously:

Cog railway switch - GIF
Flipping rail track switch - GIF
Long Island Railroad switch heaters - GIF
Railroad switchman lantern hand signal - photo and video

I'd think that electric heaters would be more efficient and cheaper to maintain, especially given that the trains are electric.

Neil