Earthquake-strengthening work on Karori Tunnel is nearing completion after a slip caused delays.
The last of the scaffolding on the Karori side will be taken down before Christmas and work on the city side is expected to be finished by the end of January.
Project manager Faiz Tawfeek said the work was delayed by a slip in October.
"We had to clear the slip, investigate, and design and build a new retaining wall, which wasn't part of the original job," he said.
The upgrade has involved rebuilding the tunnel entrances and building a new retaining wall.
- The Wellingtonian