Rail transport in New Zealand

Rail transport in New Zealand is an integral part of New Zealand's transport network, with a nationwide network of 4,128 km of track linking most major cities in the North and South Islands, connected by inter-island rail and road ferries. Rail transport in New Zealand has a particular focus on bulk freight exports and imports,[5] with 19 million net tonnes moved by rail annually,[2] with 99.5% of New Zealand's exports and imports being transported through the country's seaports.[5]

Rail transport in New Zealand
KiwiRail DL9020 on MetroPort train MP4 at Papakura, Auckland on 29 August 2011.
Operation
National railwayKiwiRail
Infrastructure companyNew Zealand Railways Corporation (land)
KiwiRail (track)
Dunedin Railways
Various heritage operators
Major operatorsThe Great Journeys of New Zealand
Transdev Wellington
Transdev Auckland
Dunedin Railways
Statistics
Ridership35 million a year[1]
Freight19m tonnes (2018–19)[2]
4.49m net tonne kilometres (2012–13)[3] 16% of total freight movements annually.[4]
System length
Total4,128 km (2,565 mi)
Double track252 km (157 mi)[5]
Electrified589 km (366 mi)
Freight only2,328 km (1,447 mi)
Track gauge
Main1,067 mm (3 ft 6 in)
1067 mm4,128 km (2,565 mi)
Electrification
Main25 kV AC
25 kV AC488 km (303 mi)
1500 V DC101 km (63 mi)
Features
No. tunnels150
Tunnel length80 km (50 mi)
Longest tunnelFreight Kaimai Tunnel
8,879 m (29,131 ft)
Passenger Rimutaka Tunnel 8,798 m (28,865 ft)
No. bridges1787
Longest bridgeFreight Rakaia river bridge 1,743 m (5,719 ft)
Passenger Waiau river bridge 700 m (2,300 ft)
Highest elevation832 m (2,730 ft)
 atPokaka, North Island Main Trunk
Map
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Rail transport played an important role in the opening up and development of the hinterland outside of New Zealand's predominantly dispersed and coastal settlements.[6] Starting with the Ferrymead Railway in 1863, most public railway lines were short, built by provincial governments and connected major centres to their nearest seaport (such as Christchurch and its port at Lyttelton Harbour). From the 1870s, focus shifted to building a nationwide network linking major centres, especially during the Vogel Era of railway construction following the abolition of the provinces. Narrow gauge of 3ft 6in (1,067mm) was adopted nationally. Railways became centrally controlled as a government department under the names New Zealand Government Railways or New Zealand Railways Department (NZR), and land transport was heavily regulated from 1931 onwards. NZR eventually expanded into other transport modes, especially with the Railways Road Services, inter-island ferries and Rail Air service. NZR also had an extensive network of workshops. By 1981, NZR employed 22,000 staff.[7]

In the early 1980s, NZR was corporatised as the New Zealand Railways Corporation and drastically restructured,[7] especially following the deregulation of land transport in 1983. The Corporation became a state-owned enterprise in 1987, required to turn a profit. In 1991, the rail, inter-island ferry and infrastructure businesses of the Railways Corporation were split off into New Zealand Rail Limited, which was in turn privatised in 1993, and renamed Tranz Rail in 1995. The parcels and bus service business units were also privatised, and the Railways Corporation continued to dispose of surplus land. The central government renationalised first the Auckland metro railway network in 2001, then the rest of the country in 2004, and finally the rail and ferry operations in 2008, creating a new state-owned enterprise, KiwiRail.[7]

Today, services are primarily provided by KiwiRail and focused on bulk freight, with a small number of tourist orientated passenger services, such as the TranzAlpine, Coastal Pacific and Northern Explorer. Dunedin Railways also operate tourist trains out of Dunedin, and a number of heritage operators run charter specials from time to time. Urban passenger rail services exist only in Auckland and Wellington. Rail in New Zealand has received significant and ongoing government investment since re-nationalisation in 2008, with the two urban rail systems being upgraded.

History

Provincial period (1863–1876)

The railway network was initially constructed by the provincial governments of New Zealand from 1863 onwards. New Zealand's first public railway was opened in that year, running the short distance between Christchurch and the wharf at Ferrymead and built by the Canterbury Provincial Railways.[8] The Canterbury Provincial Railways were built to the broad gauge of 5 ft 3 in (1,600 mm). In February 1867, Southland Province opened a branch from Invercargill to Bluff to the international standard gauge of 4 ft 8 1⁄2 in (1,435 mm).[9]

Vogel Era
The first Parnell Tunnel under construction on the Auckland-Drury line in c. 1873. The line was originally started by the Auckland Province but completed by the central government.
Main article: The Vogel Era

From 1870, the central government of Sir Julius Vogel proposed infrastructure including railway development to be funded by overseas loans of £10 million. The central government also adopted a national gauge of 3 ft 6 in (1,067 mm) with the passing of the Railways Act 1871. The first narrow-gauge line was opened on 1 January 1873 in the Otago Province, the Port Chalmers Branch under the auspices of the Dunedin and Port Chalmers Railway Company Limited. Auckland's first railway, between Auckland and Onehunga, opened in 1873. Vogel also arranged for Brogdens of England to undertake several rail construction contracts, to be built by "Brogden's Navvies" recruited in England.[10]

Central Government control (1876–1982)
Main article: New Zealand Railways Department

Following the abolition of the provinces in 1876, railway lines were controlled by the central government, originally under the Public Works Department, and from 1880 under the New Zealand Railways Department. A Minister of Railways was responsible for the department and was a member of the New Zealand Cabinet.[11]

A few private companies built railways in New Zealand, including the New Zealand Midland Railway Company, Wellington and Manawatu Railway Company, Waimea Plains Railway, and Thames Valley and Rotorua Railway Company. Only the Wellington and Manawatu Railway Company, nationalised in 1908, achieved any measure of success, with the rest being purchased by the Government before completion of their intended railway lines. One exception to this rule was the Ohai Railway Board in Southland, which was owned by the State Mines department and a local county council until its dissolution in 1990.[12]

The first major route was completed between Christchurch and Dunedin in 1878, later extended to Invercargill the following year. The North Island Main Trunk, linking capital city Wellington with the largest city Auckland, opened in 1908 after 23 years of construction. At the network's peak in 1952, about 100 branch lines were operating. Large-scale closures of branch railway lines began in the 1960s and 1970s. The network was initially protected from road transport competition under the Transport Licensing Act 1931, but this protection was gradually eased until its total abolition in 1983, along with the deregulation of the land transport industry.[13]

DEV Aratere in the Tory Channel, June 2018. The rail ferries operated by KiwiRail under the brand "Interisland Line" connect the networks of both the North and South Islands.

The networks of the North and South Islands were independent of one another until the introduction of the inter-island roll-on roll-off rail ferry service in 1962 by the Railways Department, now branded The Interislander.[14]

Corporatised ownership (1982–1993)
Main article: New Zealand Railways Corporation

In 1982, the Railways Department was corporatised into a new entity at the same time land transport was deregulated. The Railways Department became the New Zealand Railways Corporation. The Corporation embarked on a major restructuring, laying off thousands of staff and cutting unprofitable services. After the 1983 land transport deregulation there was a substantial rationalisation of freight facilities; many stations and smaller yards were closed and freight train services were sped up, increased in length and made heavier, with the removal of guard's vans in 1987 and the gradual elimination of older rolling stock, particularly four-wheeled wagons.[15]

In 1987, the Railways Corporation became a state-owned enterprise, required to make a profit. In 1990, the core rail operations of the Corporation were transferred to New Zealand Rail Limited, another state-owned enterprise, with the Corporation retaining non-core assets which were gradually disposed of, including a significant land portfolio. In many cases, the Corporation did not dispose of land due to Treaty of Waitangi claims and has continued to manage land.[16]

Private ownership (1993–2004)
Main article: Tranz Rail

New Zealand Rail Limited was privatised in 1993. In 1995 the new owners adopted the name Tranz Rail and listed the company on the New Zealand stock market and NASDAQ. Rail freight volumes increased between 1993 and 2000 from 8.5m net tonnes to 14.99m net tonnes carried annually, and then gradually fell until 2003 to 13.7m tonnes.[17] Freight volumes then increased again to 16.1m tonnes carried annually in 2012.[4]

Tranz Rail was accused of deliberately running down some lines through lack of maintenance. The Midland Line for example, which mostly carries coal from the West Coast to Lyttelton, was assessed to be in a safe but poor state by the LTSA government safety body in 2003, and has needed major repairs.[18]

Tranz Rail was accused of forcing freight onto the roads, and in 2002 introduced a containerisation scheme that assumed that most freight would be carried in containers on unit trains made up of fixed consists of flat deck wagons. Container loading depots were constructed at the major freight terminals. One of the reasons often cited for these policies was that the cost of using road transport to Tranz Rail was less than that of using rail because the road infrastructure is provided as a public good, whereas the rail network was a private good.[19]

Government purchase of Auckland rail network

The government purchased the Auckland metropolitan rail network from Tranz Rail for $81 million in 2002. Tranz Rail retained time slots for freight trains, and the Auckland Regional Council was granted slots for it to contract the operation of suburban passenger trains. Auckland railway stations not already local council owned were transferred to Auckland Regional Transport Network Limited (ARTNL), owned by the Auckland territorial authorities, which was merged with the Auckland Regional Transport Authority (ARTA), a subsidiary of the Auckland Regional Council (ARC).[20] With the creation of the "super-city" Auckland Council in 2010, ARTA was dissolved and its role was taken over by Auckland Transport, a new council-controlled organisation.[21]

Private and government ownership (2004–2008)

In 2003, the share price of Tranz Rail dropped to a record low on the New Zealand sharemarket, dropping 88% in value in 12 months[22] as a result of its poor financial state and credit downgrading.[23] The government then considered various schemes for bailing it out in return for regaining control of the rail infrastructure. Cited reasons included a "level playing field" for freight movements on road and rail, and ensuring access to the tracks for all interested parties.[19]

Toll Holdings of Australia made a successful takeover bid for Tranz Rail, subject to an agreement to sell back the infrastructure to the government for $1. In exchange, Toll was granted exclusive use of the rail network subject to minimum freight and passenger volumes, payment of track access charges and its own investment in new rolling stock. This transaction took place in July 2004, and Tranz Rail was renamed Toll NZ. The government committed $200 million of taxpayer funding for deferred maintenance and capital improvements via a new subsidiary of the New Zealand Railways Corporation, ONTRACK. An interim agreement was signed by Toll NZ for track access; Toll paid a nominal track access charge while negotiating a final agreement with ONTRACK. These negotiations did not progress and eventually went to arbitration at the start of 2008.[24]

Renationalisation (2008–current)
Main article: KiwiRail
DXB 5143 at Wellington railway station on 1 July 2008 at the launch of KiwiRail.

Instead of concluding a final track access agreement with Toll, in 2008 the government purchased the rail and ferry assets for $690 million, effective 1 July 2008.[25] The new organisation created to operate services on the rail network was named KiwiRail.

Ownership of the national rail network is vested in KiwiRail Holdings Limited, with land owned by the New Zealand Railways Corporation. KiwiRail Network (formerly ONTRACK) is a division of KiwiRail that maintains and upgrades the rail infrastructure and is responsible for the control of the network (i.e. train control and signalling). Other rail operating companies using the rail network include Transdev Auckland and Transdev Wellington, who operate suburban services in Auckland and Wellington respectively, and Dunedin Railways, who operate tourist trains out of Dunedin.

KiwiRail released in 2010 a 10-year turnaround plan for the rail industry. This was accompanied by significant government investment in KiwiRail of over $2.1 billion during the period 2008 to February 2017.[26] In May 2017, the government announced a further $450 million capital injection and that KiwiRail would be subject to a further significant review.[27] The plan has been significantly undermined by the Christchurch earthquakes of 2010 and 2011, the 2016 Kaikoura earthquake, Pike River Mine disaster, coal price collapse, coal miner Solid Energy going into voluntary administration in 2016 and major motive power issues with the new DL class of locomotives. Nevertheless, significant improvements in freight volumes have followed (other than with coal).[28]

Two of KiwiRail's major customers, Mainfreight and Fonterra, also invested heavily in rail-related infrastructure. Mainfreight allocated $60 million for investment in new railhead depots, while Fonterra invested $130m in a new rail hub complex in Hamilton and another planned for Mosgiel.[29]

In 2019, the government began a "Future of Rail" review, and in December 2019 released a draft New Zealand Rail Plan, outlining changes to the rail transport industry.[30] The draft plan proposes a number of major changes, the most significant being future funding of the rail network through the National Land Transport Fund.[31]

Current projects

The City Rail Link is an underground rail line currently under construction linking Britomart Transport Centre to Mount Eden railway station in Auckland, and is due to open in 2024. Light rail networks are planned for Auckland and Wellington.

Advocacy group Greater Auckland proposed the Regional Rapid Rail initiative in 2017, including tilt trains with a maximum speed of 160 km/h.[32] This network would provide passenger services linking Auckland with Hamilton, Tauranga and Rotorua. In December 2018, the Government of New Zealand committed funding to reintroducing a five-year trial rail service, named Te Huia, between Papakura in southern Auckland to Hamilton, starting in 2020.[33] As a result of the COVID-19 pandemic in New Zealand, the Te Huia service had been delayed commencing operations to sometime after 3 August 2020, changed from its initial announced opening date of March 2020.[34][35] In 2020, the government announced funding for a number of rail-related infrastructure projects, mainly in the Auckland region.[36]

Operations

Freight
Main article: KiwiRail
Freight marshalling yard in Dunedin, 16 August 2007. Freight makes up the bulk of KiwiRail's annual revenues.
An EF class locomotive in the Tranz Rail "bumble-bee" livery hauling container wagons on the North Island Main Trunk in 2006.
The Coastal Pacific service arriving at Picton in December 2011.
Auckland AM class electric passenger train at Newmarket station, April 2014.
A FP/FT class "Matangi" EMU at Wellington railway station, 9 September 2010.
Preserved JA class locomotive 1271 on an excursion at Ahuriri in 2003.

Freight is carried by KiwiRail and provides the majority of its revenue traffic. In the 2017–2018 financial year, freight contributed $350.7 million in revenue or 57% of the company's total revenue.[37] Freight is mostly bulk traffic geared towards export industries, with general freight being largely restricted to containerised and palletised products on the trunk route. Major bulk freight includes coal, lime, steel, wood and wood products, paper pulp, dry and liquid milk, cars, fertiliser, grain and shipping containers.[38]

Freight levels have returned to the level that they were at when the railway had a virtual monopoly on land transport, prior to 1983. In 1980 11.8 million tonnes of freight was moved by rail, in 1994 this had decreased to 9.4 million tonnes. By 1999, tonnes carried had increased to 12.9 million tonnes, slightly more than the 1975 peak.[39] In the 2006–2007 financial year, 13.7 million tonnes of freight were carried.[40] This equated to 3.96 million net tonne kilometres (or the number of tonnes of traffic gained in 2008–2009 compared to the amount of traffic hauled in the 2006–2007 year).[40]

In recent years the amount of freight moved by rail has increased substantially and has started to gain market share in non-bulk areas as well. Freight on the North Island Main Trunk line between Auckland and Palmerston North saw an increase of 39% in freight volumes between 2006 and 2007. The five daily trains on the 667 km line reduced truck volumes on the route by around 120 per day.[41]

A 2008 study by the Ministry of Transport predicted that by 2031 rail freight volumes would increase to 23 million tonnes per annum or 70% on the 2006–2007 financial year. In 2018 the same report found freight levels had increased by 17% between 2007 and 2012.[40]

Long-distance passenger services
Main article: The Great Journeys of New Zealand

As of 2017, there are only four long-distance passenger routes: the Northern Explorer between Auckland and Wellington, the Capital Connection between Wellington and Palmerston North, the Coastal Pacific between Picton and Christchurch, and the TranzAlpine between Christchurch and Greymouth. All are operated by The Great Journeys of New Zealand, a division of KiwiRail, and are tourism focused except for the Capital Connection, which is a commuter service.[42]

Until June 2020, Dunedin Railways operated tourist trains out of Dunedin, with frequent services on the former Otago Central Railway line and occasional services north from Dunedin to Palmerston. This service was mothballed in the wake of the COVID-19 pandemic.[43][44]

Mixed trains were "once the backbone of the New Zealand railway passenger system" on branch and even main lines; but the last scheduled mixed train ran between Whangarei and Opua on 6 June 1977. With a "rake of assorted wagons" and one or two passenger carriages, often listed as "goods with car" in timetables, they were slow, often stopping and shunting wagons en route. In the 1930s they ran from Christchurch to Springfield on the Midland Line, and into the 1950s overnight between Christchurch and Dunedin. On the North Island Main Trunk they ran during the day while the expresses ran at night. On the Okahukura-Stratford Line they lasted to the early 1970s.[45]

In the 1950s and 1960s, most provincial routes had railcar and locomotive-hauled passenger services. In 1965, 25 million passengers travelled by rail; by 1998 the number had decreased to 11.7 million.[39] A number of services came to an end in the early 2000s, including the Waikato Connection between Hamilton and Auckland, the Kaimai Express between Auckland and Tauranga, the Geyserland Express between Auckland and Rotorua, the Bay Express between Wellington and Napier, the Southerner between Christchurch and Invercargill and the Northerner night service between Auckland and Wellington.[46]


Suburban passenger services

Currently, Auckland and Wellington have suburban passenger services. In both cities, the respective local governments own the suburban passenger rolling stock and contract the operation of services to a third-party, in both cases Transdev.[47]

Wellington

The Wellington suburban network has five lines: Johnsonville, Kapiti, Melling, Hutt Valley and Wairarapa. In 1938, Wellington became the second city (after the Christchurch service to Lyttelton) to have electric suburban trains, and from 1970 to 2014 was the only city with them.[48]

From July 2016, the services have been operated by Transdev Wellington.[47] Prior to Transdev, KiwiRail's Tranz Metro division held the contract. Wellington's suburban rolling stock consists of electric multiple units, with diesel locomotive-hauled carriage trains used on the Wairarapa service. All of the rolling stock (except the diesel locomotives) is owned by Greater Wellington Rail Limited, a subsidiary of Greater Wellington Regional Council. Transdev Wellington contracts KiwiRail to provide and operate the required diesel locomotives.[47]

Auckland

Auckland's network consists of four lines: Southern, Eastern, Western and Onehunga. All services on these lines are provided by AM class electric trains, the conversion from diesel being completed by the end of 2015[49] with the exception of the non-electrified section of track between Papakura and Pukekohe, where a diesel train shuttle service operates. Transdev Auckland operates the electric trains on behalf of Auckland Transport (AT). In recent years the mothballed Onehunga Branch was reopened (2010)[50] and a new line was built (Manukau Branch, opened April 2012).[51] Recent major projects include electrification of the Auckland suburban network and the building of the City Rail Link. Most Auckland rolling stock is owned by Auckland Transport, which funds and coordinates all services.[52]

Other cities
Main article: Rail transport in Christchurch

In 2017, the recently elected Labour-led Coalition government proposed to provide commuter rail in Christchurch and to provide long-distance commuter services from Auckland to Hamilton and Tauranga.[53]

Other cities (Christchurch, Dunedin, Invercargill and Napier-Hastings) once had suburban services, but they were withdrawn due to a lack of patronage. The Christchurch-Lyttelton suburban service was stopped in 1972 when passengers were down to "a busload". The last "boat train" for the ferry service to Wellington ran in 1976. The 10.5 km line to Lyttelton was electrified from 1929 to 1970. There were worker's trains north to Rangiora; two in the morning and two in the afternoon. Dunedin had suburban trains to Port Chalmers and Mosgiel, withdrawn on 3 December 1982. The Invercargill to Bluff service stopped in 1967; in 1929 the sole Clayton steam railcar had been used. Trains ran the 12 miles (19 km) between Napier and Hastings but some were replaced by a New Zealand Railways Road Services bus in 1926, and soon they ceased altogether.[54]

Worker's concession tickets had been introduced in 1897, initially for the Wellington-Hutt service, and extended next year to Auckland, Christchurch and Dunedin (and then between Westport and Waimangaroa). A 1979 NZR report "Time for Change" said that the Wellington suburban services revenue met only 26% of operating costs (Dunedin was 28%, Auckland 46%).[55]

School commuters
See also: Nelson Section § School Trains

Up to the 1930s and 1940s, pupils had to commute to larger towns for secondary education from places that only had a primary school; for example from rural Canterbury to Christchurch Technical High School.[56] Another famous example was Sir Edmund Hillary who commuted by school train from Tuakau to Auckland Grammar School for three and a half hours, a one-hour and 40 minutes journey each way.[57] School trains ran between Picton and Blenheim, allowing Picton students to attend Marlborough College (split into Marlborough Boys' College and Marlborough Girls' College in 1963). The service was cancelled when Queen Charlotte College opened in Picton in 1965, and those students remaining at the Marlborough Colleges switched to buses.[58][59]

The NZR offered season tickets for primary and secondary school students from 1877, using funds paid for out of the Education budget, and from 1885 for students attending primary schools from a place lacking a local school.[60] Premier Richard Seddon and the Liberal Government were keen to place secondary education "within the reach of the poorest man in the Colony" with an extension of the free passes in 1898 and 1909. School season passes increased from 8720 in 1899 to 29,705 in 1914–15, when one in seven primary and secondary students travelled by train. Some pupils reached home after dark in the winter and had to milk cows before and after school. John Pascoe said that some children spend "up to six hours a day travelling." Boys and girls were usually segregated.[61]

Infrastructure and mechanical

Rail network
Main article: List of railway lines in New Zealand

The New Zealand rail network has around 4,128 kilometres (2,565 miles) of line,[62] of which about 506 kilometres (314 miles) is electrified. At the network's peak in 1953, some 5,689 kilometres (3,535 miles) of line was open.[63] There are currently 1787 bridges and 150 tunnels (totalling 80 kilometres (50 mi) in length) on the rail network.[64]

The entire network is built to the 1,067 mm (3 ft 6 in) gauge, chosen due to the need to cross mountainous terrain in the country's interior and the lower cost of construction.[65][66] Difficult terrain meant that some lines took years to complete, and has necessitated a number of complicated engineering feats, notably the Raurimu Spiral and Rimutaka Incline (the latter no longer in use).[67]

The network has been the subject of major upgrading works on a number of occasions. The biggest of these were the Westfield Deviation of the North Island Main Trunk from Auckland to Westfield Junction via Panmure and Glen Innes, opened 1930, the Tawa Flat deviation in Wellington, opened 1937;[68] the Rimutaka deviation to the Wairarapa, opened 1955;[67] and the Kaimai deviation in the Bay of Plenty, opened 1978. All of these involved major tunnelling works, of close to 9 kilometres (5.6 miles) each in the two latter cases. Significant infrastructure improvements were also carried out on the North Island Main Trunk in the mid-1980s, some as part of the electrification scheme.[69]

As part of the 10-year Turnaround Plan announced in 2010, a number of regional lines were placed under threat of closure:[70] all lines in Northland that form part of the North Auckland Line, the Stratford–Okahukura Line in Taranaki (mothballed since 2009), the northern portion of the Wairarapa Line, the Gisborne – Napier section of the Palmerston North - Gisborne Line (mothballed due to storm damage north of Wairoa early 2012, mothballed Napier – Gisborne from October 2012)[71] As part of KiwiRail's 10-year long-term plan, most new capital will be spent on locomotives, wagons and the Auckland – Wellington – Christchurch freight corridor.[72]

Signalling

Six signalling systems are used in New Zealand: automatic signalling rules (ASR), double line automatic (DLA), single line automatic (SLA), centralised traffic control (CTC), track warrant control (TWC), and station limits. Signals are of the colour light type and operate on speed signalling principles, i.e. signals tell the driver what speed they should proceed, but not necessarily the route they will take.[73] The Auckland suburban network is also equipped with European Train Control System (ETCS) Level 1 signalling and train protection.[74]

Motive power
Main article: Locomotives of New Zealand

Steam

From its inception until the 1950s, steam locomotives were the main motive power on New Zealand's railways. Initially, steam locomotives were mostly imported from the United Kingdom from various manufacturers.[75] The first major class was the F class tank locomotives, of which 88 were imported. From the 1870s, locomotives were imported from the United States, and generally found to be better suited to New Zealand's conditions, although the pro-British public and politicians preferred locomotives from the United Kingdom.[75] In 1889, NZR began manufacturing its own locomotives, starting with the NZR W class.[75] Local engineering firm A & G Price also manufactured a significant number of steam locomotives for NZR.[76]

Diesel

Dieselisation of rail transport began in the late 1940s with small shunting locomotives.[77] The first mainline diesel locomotives, the English Electric DF class, were introduced in 1954, but it was not until the introduction of the DA class locomotives the following year that steam began to be seriously displaced in the North Island. The last steam locomotive to be built by NZR, JA 1274, was introduced into service in December 1956, and by 1967, steam had all but disappeared from the North Island. Steam remained in the South Island until November 1971, when the last seven JA locomotives that worked the Main South Line were withdrawn from revenue service, steam in the South Island having been displaced by the DJ class locomotive.[78]

Starting from the mid-1970s, the first generation diesel locomotives were withdrawn, being replaced by new locomotives, predominantly designs from North America. The General Electric manufactured DX class were introduced from 1972–1975, and the original DF class were withdrawn and the General Motors DF class introduced from 1979.[79] NZR also rebuilt some of the DG class locomotives. At the same time, the newest locomotives of the DA class were rebuilt as DC class locomotives in Australia and New Zealand. The last of the first-generation diesel locomotives were withdrawn in the late 1980s and early 1990s.[79]

Chinese-built DL class locomotive 9193 hauling a freight train at Middlemore in November 2012. The DL class are the newest locomotives on New Zealand's network.

Due to a decline in rail freight volumes following land transport deregulation in 1983, and the introduction of electrification on the North Island Main Trunk, no new mainline diesel locomotives were introduced in the 1990s.[80] Some second-hand locomotives were imported from Queensland Rail in the mid-1990s and rebuilt as DQ class locomotives, most of these locomotives were then re-exported to TasRail, then part-owned by Tranz Rail. The first new diesel locomotives imported to New Zealand since the 1970s were the DL class locomotives from China, arriving from 2010 onwards.[81]

Electric
Main article: Railway electrification in New Zealand

In the 1920s, two short sections of railway line were electrified at 1500 V DC: Arthur's Pass to Otira (electrified 1923) and Christchurch to Lyttelton (1929), both which have since been decommissioned.[82] Electrification of the Wellington suburban network at 1500 V DC began in 1938 with the Johnsonville Line, followed by the North Island Main Trunk (NIMT) as far as Paekakariki in 1940, and the Hutt Valley lines in 1953–55. The NIMT electrification was extended to Paraparaumu in 1983 and to Waikanae in 2011.[82]

In 1988, 25 kV AC electrification of the North Island Main Trunk (NIMT) between Palmerston North and Hamilton was commissioned, and a new generation of mainline electric locomotives, the EF class, was introduced.[83]

In 2014, electrification of Auckland's suburban rail network was completed, also built to 25 kV AC.

Couplings
Norwegian couplers on historic railway wagons in Little River, New Zealand.

The Norwegian coupling was the standard coupler used in New Zealand for non-passenger rolling stock and locomotives until recent years. In the 1970s a large heavy-duty version of the chopper coupler was developed, initially for the DX class.[84] Auckland's AM class and Wellington's FP/FT class "Matangi" electric multiple units use the Scharfenberg coupling.[85]

The Janney ("Alliance") coupler was first used on heavy coal trains and have been progressively introduced on newer rolling stock and rebuilt locomotives. A program of retrofitting older rolling stock has been underway since 2013.[86]

Workshops

The New Zealand Railways Department had major workshops at Addington (Christchurch), Easttown (Wanganui), Hillside (Dunedin), Petone (Lower Hutt, near Wellington) then Hutt (Lower Hutt, near Wellington) and Newmarket then Otahuhu, (Auckland). All were progressively closed (mostly in the 1980s), leaving only Hutt Workshops still operating. A number of small maintenance depots also currently operate, for example at Addington, Christchurch.[87]

Accidents
Main article: List of rail accidents in New Zealand

Safety regulation is the responsibility of the New Zealand Transport Agency. NZTA also investigates accidents and incidents with a view to ensuring regulations and rules were observed.[88] The Transport Accident Investigation Commission may also inquire into selected accidents and incidents to determine the circumstances and causes and help prevent similar occurrences in the future.[89]

Modern signalling, train detection and communications systems, as well as an overall decline in rail passenger traffic, has greatly decreased the number of fatal accidents occurring on New Zealand's railway network.[90]

New Zealand's most serious rail disaster occurred on Christmas Eve 1953, during the visit of Queen Elizabeth II, when a lahar washed away the bridge in the Tangiwai disaster. 151 lives were lost when the bridge collapsed as a Wellington-Auckland express passenger train was crossing it.[91] The next most serious accident was the Hyde railway disaster of 1943, when the Cromwell - Dunedin express derailed after travelling at excessive speed. 21 lives were lost. The driver was later found to have been intoxicated and was jailed for manslaughter.[91]

Heritage rail
Main article: Railway preservation in New Zealand

Heritage mainline passenger services

Four heritage rail operators own and operate their own carriage and mainline-certified steam or diesel locomotive fleets. These are the Railway Enthusiasts Society, Steam Incorporated, Mainline Steam Trust and the Otago Excursion Train Trust. These groups have operated special excursion trains on the national network since 1978, and have been allowed to use suitable locomotives to haul these trains since 1985.[92]

Heritage and museum railways

About 60 groups operate railway heritage lines or museums, almost all members of the Federation of Rail Organisations of New Zealand. They include street tramways and bush tramways as well as railways. Large-scale rail preservation in New Zealand got underway in the 1960s when many steam locomotives were withdrawn and branch lines closed.[93][94]

Current operations of the heritage railway type include the Kingston Flyer, Glenbrook Vintage Railway, Bush Tramway Club, Waitara Railway Preservation Society, Weka Pass Railway, and Dunedin Railways. Dunedin Railways is a Council-controlled organisation (CCO) 72% owned by the Dunedin City Council and runs the Taieri Gorge Limited which is 60 kilometres (37 mi) in length, and various other services around Dunedin and Otago.[44]

All other lines are operated by voluntary societies. The Weka Pass Railway at 13 kilometres (8.1 mi) is the most lengthy of these. The Bay of Islands Vintage Railway is 11 kilometres (6.8 mi) in length, but is in poor condition; having operated its first trains through Kawakawa since operations ceased in 2000 for two weeks from 3 July 2007, the Society is now working on rehabilitating the track between Kawakawa and Opua.[95]

New Zealand National Film Unit Film Director David Sims completed a number of films on the history of New Zealand railways,[96] including Main Trunk Century (2009); The Truth About Tangiwai (2002); Total Steam (1996); North Island Main Trunk (1995).[97]

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See also

References
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  95. "Bay of Islands Vintage Railway - Our Future". Bay of Islands Vintage Railway. 2019. Retrieved 25 April 2019.
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