Long considered a gateway between Palmerston North and Woodville to Dannevirke, the Manawatu Gorge road is a route that has also been fraught with difficulty.
The road was originally completed in 1872 and has a long history of instability.
A large slip closed the Gorge in April 2017 and workers were sent in to try to reopen it, but in July 2017 another slip forced its permanent closure.
Since 2020, Waka Kotahi NZ Transport Agency has been working on a new road that will go above the gorge under the project name Te Ahu a Turanga: Manawatū Tararua Highway. The project isn't expected to be finished until December 2024.
Pahiatua Railcar Society has been running excursions through the Gorge with its most recent one last weekend.