State Highway 1 in Waikato was closed for almost four hours this morning during peak commuter traffic after a roading truck crashed.
The vehicle, part of national company Traffic Management's fleet, appeared to swerve across the busy highway as it headed south at Pokeno before ploughing off the road about 6.40am.
Three people were injured, two seriously, but it is not known if they were travelling to or from work.
The truck was carrying stacks of orange road cones, which were recovered at the scene.
The owner of the company refused to comment when contacted by the Herald today.