A Christchurch City Councillor is firmly against new city speed limits.

The Council's 'Draft Safer Speed Plan' includes a reduction to 30 kilometres an hour in residential areas - and 50 on roads like Blenheim Road and Memorial Avenue.

Its Transport Operations Manager, Stephen Wright, says the evidence shows safer speeds save lives.

Councillor Aaron Keown disagrees.

He claims there's no evidence lower speeds save lives.

"Since 'Road to Zero' started in 2019, the road toll's slightly up. We've spent billions and done a lot of advertising and lowered a whole lot of speeds- and haven't put a dent in the road toll."

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