Flames from gas-fed heaters stop snow and ice from clogging up the track at railway intersections.
from BBC News - Home Polar vortex: Fire used to melt ice on Chicago train trackshttps://https://bbc.in/2MI4Akl
from BBC News - Home Polar vortex: Fire used to melt ice on Chicago train trackshttps://https://bbc.in/2MI4Akl
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