Wellington City Council must \xa0temporarily hit the brakes on its proposed speed limit slash.
In its proposal to drop many speed limits to 30 kilometres per hour, the council overstated - by $250-million - \xa0the cost-benefit analysis of reducing crashes in consultation papers.
Councillor Tony Randle spotted the mistake and told Mike Hosking it was peer reviewed.
He says more than one person made a mistake and it was one small error that multiplied.
Submitters are being apologised to and council will be briefed in August.
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