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Kwun Tong line
The Kwun Tong line (Chinese: 觀塘綫) is a rapid transit line of the MTR network in Hong Kong. Starting at Whampoa in Hung Hom and ending at Tiu Keng Leng in Tseung Kwan O, Sai Kung, the route has 17 stations and takes 35 minutes to complete. The Kwun Tong line is one of the busiest railway lines on the network connecting the central and the eastern portions of Kowloon via Wong Tai Sin. The line is mostly underground, but includes a lengthy elevated section, and runs generally in an east-west direction. During the morning rush hour, the Kwun Tong line utilises 33 trains running at 29tph (trains per hour) to achieve a route capacity of 85,000 pphpd (passengers per hour per direction).
Opened on 1 October 1979 as the first urban railway line in Hong Kong and the first operated by the Mass Transit Railway Corporation (MTRC), the Kwun Tong line operates over much of the original section of the "Modified Initial System", from Shek Kip Mei to Kwun Tong station, which it is named after. The line has seen the most changes in alignment of all the MTR lines, the most recent in 2016. It has crossed Victoria Harbour to serve Hong Kong Island using two separate routes in its history, though other lines have since taken over the harbour crossings. As such, the current route lies entirely within Kowloon except for Tiu Keng Leng in the New Territories. It has interchanges with four other lines: the Tsuen Wan line at Yau Ma Tei, Mong Kok and Prince Edward stations, the East Rail line at Kowloon Tong station, the Tuen Ma line at Ho Man Tin and Diamond Hill stations, and the Tseung Kwan O line at Yau Tong and Tiu Keng Leng stations.
The Kwun Tong line operates over the majority of the track used by the "Modified Initial System", and can so be said to be the first MTR line to enter service. It was predated only by the suburban East Rail line, which at the time was in the process of being electrified and upgraded to a commuter service as part of the Kowloon–Canton Railway. Construction was approved in November 1975 under the administration of Governor Murray MacLehose, and service commenced on 1 October 1979. The line initially ran between Shek Kip Mei station and Kwun Tong station, and each train consisted of four cars. The trains were expanded to consist of 6 cars and 8 cars later respectively. It was extended to the south twice: firstly to Tsim Sha Tsui on 31 December 1979, and secondly to Central station on 12 February 1980 (named Chater at the time), crossing Victoria Harbour through the first underwater rail tunnel in Hong Kong and completing the original Modified Initial System plan.
When the Tsuen Wan line started service in May 1982, it took over the section of the Modified Initial System south of Argyle (present-day Mong Kok). At that point, Waterloo (present-day Yau Ma Tei) station became the terminus of the newly christened Kwun Tong line (until then, the line had no official name), and both Argyle and Prince Edward stations became cross-platform interchange stations with the new line.
When the Hong Kong government decided to build a second harbour crossing in 1984, it awarded a franchise for the construction of a mixed rail and road tunnel under the harbour. Consequentially, the Kwun Tong line was extended through the new tunnel on 6 August 1989 to a new terminus at Quarry Bay, a transfer station with the newly built Island line. An intermediate station, Lam Tin, was opened on 1 October of the same year.
The first derailment in MTR history (excluding ex-KCR lines) took place at Kowloon Bay station in 1994. The seventh carriage of a train pulling into the station at about 60 km/h (37 mph) jumped the tracks on 28 January 1994, on a section of track adjacent to the MTR headquarters building. Nobody was injured, though train services were disrupted. The incident was blamed on a bolt in the train's suspension system which had worked itself loose, causing the weight load to be concentrated on the rear wheels of the carriage.
As part of a project to reduce congestion at Quarry Bay, the Kwun Tong line was briefly extended to North Point on 27 September 2001. This station did not last as the terminus for long, as the newly built Tseung Kwan O line would take over the cross-harbour portion of the route in 2002. On 18 August 2002, The Kwun Tong line was extended to Tiu Keng Leng, its present eastern terminus, coinciding with the opening of the Tseung Kwan O line.
Although not in regular service, the original tunnel linking the Kwun Tong line to the Eastern Harbour Crossing continues to be maintained and can be utilised in the event of a disruption on the Tseung Kwan O line. Such an incident occurred on 16 December 2013, when a train on the Tseung Kwan O line broke down, halting train services on the entire line for several hours. To prevent cross-harbour train service from being disrupted, all Kwun Tong line trains temporarily used the old tracks from Lam Tin to Quarry Bay and terminated at North Point, as they did before the opening of the Tseung Kwan O line. This was the first time since 2002 that the Lam Tin to Quarry Bay tracks were utilised for regular service.
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Kwun Tong line
The Kwun Tong line (Chinese: 觀塘綫) is a rapid transit line of the MTR network in Hong Kong. Starting at Whampoa in Hung Hom and ending at Tiu Keng Leng in Tseung Kwan O, Sai Kung, the route has 17 stations and takes 35 minutes to complete. The Kwun Tong line is one of the busiest railway lines on the network connecting the central and the eastern portions of Kowloon via Wong Tai Sin. The line is mostly underground, but includes a lengthy elevated section, and runs generally in an east-west direction. During the morning rush hour, the Kwun Tong line utilises 33 trains running at 29tph (trains per hour) to achieve a route capacity of 85,000 pphpd (passengers per hour per direction).
Opened on 1 October 1979 as the first urban railway line in Hong Kong and the first operated by the Mass Transit Railway Corporation (MTRC), the Kwun Tong line operates over much of the original section of the "Modified Initial System", from Shek Kip Mei to Kwun Tong station, which it is named after. The line has seen the most changes in alignment of all the MTR lines, the most recent in 2016. It has crossed Victoria Harbour to serve Hong Kong Island using two separate routes in its history, though other lines have since taken over the harbour crossings. As such, the current route lies entirely within Kowloon except for Tiu Keng Leng in the New Territories. It has interchanges with four other lines: the Tsuen Wan line at Yau Ma Tei, Mong Kok and Prince Edward stations, the East Rail line at Kowloon Tong station, the Tuen Ma line at Ho Man Tin and Diamond Hill stations, and the Tseung Kwan O line at Yau Tong and Tiu Keng Leng stations.
The Kwun Tong line operates over the majority of the track used by the "Modified Initial System", and can so be said to be the first MTR line to enter service. It was predated only by the suburban East Rail line, which at the time was in the process of being electrified and upgraded to a commuter service as part of the Kowloon–Canton Railway. Construction was approved in November 1975 under the administration of Governor Murray MacLehose, and service commenced on 1 October 1979. The line initially ran between Shek Kip Mei station and Kwun Tong station, and each train consisted of four cars. The trains were expanded to consist of 6 cars and 8 cars later respectively. It was extended to the south twice: firstly to Tsim Sha Tsui on 31 December 1979, and secondly to Central station on 12 February 1980 (named Chater at the time), crossing Victoria Harbour through the first underwater rail tunnel in Hong Kong and completing the original Modified Initial System plan.
When the Tsuen Wan line started service in May 1982, it took over the section of the Modified Initial System south of Argyle (present-day Mong Kok). At that point, Waterloo (present-day Yau Ma Tei) station became the terminus of the newly christened Kwun Tong line (until then, the line had no official name), and both Argyle and Prince Edward stations became cross-platform interchange stations with the new line.
When the Hong Kong government decided to build a second harbour crossing in 1984, it awarded a franchise for the construction of a mixed rail and road tunnel under the harbour. Consequentially, the Kwun Tong line was extended through the new tunnel on 6 August 1989 to a new terminus at Quarry Bay, a transfer station with the newly built Island line. An intermediate station, Lam Tin, was opened on 1 October of the same year.
The first derailment in MTR history (excluding ex-KCR lines) took place at Kowloon Bay station in 1994. The seventh carriage of a train pulling into the station at about 60 km/h (37 mph) jumped the tracks on 28 January 1994, on a section of track adjacent to the MTR headquarters building. Nobody was injured, though train services were disrupted. The incident was blamed on a bolt in the train's suspension system which had worked itself loose, causing the weight load to be concentrated on the rear wheels of the carriage.
As part of a project to reduce congestion at Quarry Bay, the Kwun Tong line was briefly extended to North Point on 27 September 2001. This station did not last as the terminus for long, as the newly built Tseung Kwan O line would take over the cross-harbour portion of the route in 2002. On 18 August 2002, The Kwun Tong line was extended to Tiu Keng Leng, its present eastern terminus, coinciding with the opening of the Tseung Kwan O line.
Although not in regular service, the original tunnel linking the Kwun Tong line to the Eastern Harbour Crossing continues to be maintained and can be utilised in the event of a disruption on the Tseung Kwan O line. Such an incident occurred on 16 December 2013, when a train on the Tseung Kwan O line broke down, halting train services on the entire line for several hours. To prevent cross-harbour train service from being disrupted, all Kwun Tong line trains temporarily used the old tracks from Lam Tin to Quarry Bay and terminated at North Point, as they did before the opening of the Tseung Kwan O line. This was the first time since 2002 that the Lam Tin to Quarry Bay tracks were utilised for regular service.