Police have blasted Brian Tamaki's convoy on State Highway 1 as "reckless, unlawful, and extremely irresponsible"

It's now looking to take enforcement action, after protestors entered Auckland's motorway network on foot.

Acting Assistant Commissioner Naila Hassan, says they were monitoring a vehicle protest, and weren't aware of plans for them to be on the motorway on foot.

She says a permit wasn't sought for that, and as a result, there were no traffic management plans in place to keep the wider public safe.

Ms Hassan says the unexpected activity caused disruption for thousands unable to plan for delays or take alternate routes.