Locomotives having internal combustion engines are a source of 'fire'. A Buffer car(s) is not a source of fire (note - Mechanical Referigerator cars can not be used as buffers either).
Never too old to have a happy childhood!
I know trains like ethanol trains need a buffer car between the crew and tank cars - commonly a hopper.
So if you got 3 locomotives, why can't the rear locomotive be the buffer?
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