Budget Day 'carkoi' protests delayed traffic on Auckland and Tauranga motorways ahead of a hikoi on Parliament.

Protesters earlier took the roads to oppose government policies toward Māori, 'activating' for today's National Māori Action Day - and caused traffic delays around the country.

It's the second time Māori have mobilised on a national scale with the first hīkoi taking place last December.

The national protest coincides with today's budget announcements.