At the Colorado line the snow plough turned back, as if at a real border.

ECONOMIST: America��s highways

Cardiff Airport said a snow plough will be in operation but to check with the airport for any schedule changes.

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"We're urging folks not to travel today and to leave the driving to our professional snow plough drivers, " a Maryland transport spokeswoman said.

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The council is also considering purchasing a snow plough and grit spreader to help contractors' clear footways and will supply salt to parishes who request it, they said.

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S. Taylor Services used a tractor plough and snow shovels to help clear the paths to the building.

BBC: Clearing snow

Whenever snow is hard and packed, we should plough it.

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