RCMP said the debris was cleared and traffic was moving again on Tuesday morning on a busy northern Alberta highway after a semi-trailer truck carrying molten sulphur rolled, resulting in a cargo leak.
The single-vehicle crash happened Monday on Highway 63, east of the community of Grassland.
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Police said no one was hurt when the truck ended up in a ditch.
Detours were set up and officials expected it would take quite some time before the area was cleared.
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There was no immediate word on how much sulphur leaked.
Grassland is about 180 kilometres north of Edmonton.