So there are two things DoC are considering:

·         Grant concessions to Milford Dart Limited to investigate, construct, operate and maintain a bus tunnel from the Routeburn Road in Mt Aspiring National Park to the Hollyford Road in Fiordland National Park.

·         Grant concessions to Riverstone Holdings Limited to construct, operate and maintain a monorail and associated construction /mountain bike track through the Snowdon Forest Conservation Area, and associated terminus facilities on marginal strip alongside the Mararoa River, and Fiordland National Park (Te Anau Downs).

Also, its possible this contravenes NZs responsibilities under the World Heritage Convention as the area is in Te Wahiponamu WHS...

Have a look at these for more info: