>> Not sure if I heard this correctly… apparently where some of the railway lines have
>> started to buckle they have been painting them white to help.
>>
>> Doesn’t the silver steel reflect more of the solar energy rather than using white paint?
Zero will be along in a minute with expert view but in meantime I'd guess it's only the contact point of the rail that's shiny. Buckling, or risk of buckling, is a fairly common cause of delay and at least one accident:
assets.publishing.service.gov.uk/media/576d3cffe5274a0da9000090/R112016_160627_Langworth.pdf
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