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New M4 specification released

09 Aug 2024


The NZ Transport Agency Waka Kotahi has recently released the new M4 specifications for basecourse aggregate.

There has been a lot of effort from the industry in reviewing these - including from the CCNZ Surfacing Committee. The new specifications let go of a 'one size fits all' approach and give the roading and construction industry a few more tools to call up when asking for materials.

Thanks to everyone that contributed their time and effort into this review.

Read the updated M4 specification>>

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