16 May 2022. Trains Transdev Wellington operates Metlink's five-line commuter network, which fans north out of Wellington railway station as far as Waikanae in the north and Masterton in the east. Transdev Wellington operates the service under contract to the Greater Wellington Regional Council with rolling stock (except for diesel locomotives used on the Wairarapa services) owned by the council, and rail infrastructure owned by KiwiRail. Until 2016 KiwiRail division Tranz Metro had the contract to operate Metlink's services. On average, 930,000 trips are made on Metlink trains each month. In 2013-14, Tranz Metro claimed 94.3% punctuality, being the proportion of trains arriving within five minutes of schedule (94.7% punctuality if normalised for the effects of the 2013 Seddon earthquake and 2013 Lake Grassmere earthquake). Since July 2016, Wellington's commuter rail services have been operated by Transdev Wellington. Transdev subcontracts KiwiRail to provide and operate the diesel locomotives on the Wairarapa services. In the year ending 30 June 2017, 88.3% of rail services ran on time; this figure is lower than previous years, as timeliness is now measured directly by Metlink rather than relying on self-reporting by the operator, and is measured at all key stations rather than just Wellington Station. There are two major rail corridors in Wellington. The North Island Main Trunk (NIMT) runs along the western coastline, passing through Porirua and Paraparaumu to Waikanae on the Kapiti Coast (known as the Kapiti Line); the Wairarapa Line runs along the edge of Wellington Harbour and then up the Hutt Valley, passing through both Lower and Upper Hutt (known as the Hutt Valley Line). Less frequent services continue through the rural Wairarapa, stopping at a number of small towns before terminating at Masterton. There are also the Johnsonville Line in the north of Wellington and the Melling Line on the western side of Lower Hutt. The Kapiti Line and Hutt Valley Line are mostly double track, except for a short stretch on the Kapiti Line between Muri and Paekakariki and between the Waikanae River and Waikanae station. The Johnsonville line is single track with passing loops, while the Melling lines is single track throughout. There are 49 stations in the rail network, all except Wellington railway station owned by Greater Wellington Regional Council. Wellington station is the busiest by far, with trains arriving and departing every few minutes at peak times. The next busiest stations are Porirua, Waterloo (in