What is "tranzalpine"

The TranzAlpine is a passenger train operated by KiwiRail Scenic Journeys in the South Island of New Zealand over the Midland Line; often regarded to be one of the world's great train journeys for the scenery through which it passes (see famous trains). The journey is one-way, taking about four and a half hours. There are 19 tunnels and four viaducts, with the Staircase Viaduct being high.

The train has become increasingly popular, and carried 204,000 passengers in the financial year ending 2007. By 2016 numbers were about 130,000 a year, but rising again after the setback of the Christchurch earthquake, and were exceeding pre-earthquake levels.