In 1884 the government recommended the North Island Main Trunk between Te Awamutu and Marton railway follow the central route as surveyed by John Rochfort.
In 1887, a start was made to upgrade a bridle trail close to the proposed route between Ohakune and Raurimu.
The plan was to first turn the bridle trail into a service road and then made suitable for coach traffic.
In 1906, the steep parts on the 8•5 km section of the service road between Ohakune and Horopito were surfaced with cobblestones.
On January 10, 1907, the first coach carrying railway passengers travelled from Raurimu to Raetihi and Ohakune.
Coaches ferried railway passengers between railheads until November 8, 1908, when the railway tracks were ready for regular train running.
With the railway line completed, and regular trains running, there was no further need for coach services and the road was left unmaintained.
No other road of this age, length and surface exists in New Zealand.
