Gas-fed train track heating system - GIF

Gas-fed train track heating system.

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Previously:

https://www.homemadetools.net/forum/...615#post216045
https://www.homemadetools.net/forum/...511#post182018
https://www.homemadetools.net/forum/...987#post120128
https://www.homemadetools.net/forum/...085#post217852
https://www.homemadetools.net/forum/...912#post156575

(Please be gentle, I'm asking in ignorance.)

Is this so the switching hardware doesn't freeze up?

That would be my guess.
I wonder where this is?