The Road Transport Forum says there needs to be more priority placed on clearing roads quickly after crashes.
A truck and trailer unit crashed early this morning in the Ngauranga Gorge north of Wellington, blocking the southbound lanes of the motorway.
The incident caused major delays and was not expected to be fully cleared until later today.
Road Transport Forum chief executive officer Ken Shirley said main road blockages had a huge economic impact on the community.
Mr Shirley said, overseas, roads were cleared more quickly because appropriate vehicle units were more accessible and kept in key areas.