Sightseers wanting to catch a glimpse of Mt Tongariro after it erupted on Wednesday are being warned by police not to cause traffic hazards in the area.
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Police are urging motorists to pull off the road and use car parks where possible to reduce the risk of accidents.
"We expect many people will want to take advantage of the clear conditions to visit.
"Whilst we don't discourage people from now travelling to the area we are asking them to put road safety and their own safety before sightseeing," area commander Inspector Steve Bullock said.
He said while traffic volumes in the area were usually light, it was fast-moving and people needed to take care around parked cars and when crossing the road.
Some roads were closed in the area immediately after the eruption which sent ash and gas spewing kilometres into the air from the Te Maari crater but all had reopened.