Charges have been laid after protesters calling for increased spending on passenger rail blocked a Wellington highway for the third time this week.
The Restore Passenger Rail activists sat in front of traffic on State Highway 2 at Melling in the Hutt Valley about 8.15am on Friday.
Police said six people were arrested following the protest action and have now been charged with trespass and criminal nuisance.
"In addition to the offence of being a pedestrian on the motorway, it's reckless," said Hutt Valley Area Commander Dion Bennett.