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The new station has been built with provision for four tracks as part of future quadruplication plans.
The pedestrian subway was built as part of the track quadruplication in 1923.
The rail plans also involved significant duplication and quadruplication of existing lines.
Two additional platform faces (now platforms 2 and 5) came with quadruplication in 1907.
But neither Celera nor the consortium has found any evidence for the alleged quadruplication.
Quadruplication of the tracks towards the city in 1976 put an end to the junction and closed the signal box.
It reported that quadruplication would provide simpler operational patterns.
"We have to have quadruplication of any needed form.
The line has only two tracks through Kamen, although quadruplication is planned, but its realisation is far away.
This second crossing was constructed in 1957 as part of the quadruplication of the Ipswich railway line.
The quadruplication of tracks in the Untertürkheim area meant that the Neckar had to be straightened.
In 1980, quadruplication of the track between Blacktown and St Marys was completed.
In 2013 the quadruplication was extended to Revesby as part of the Rail Clearways program.
It uses the Circumvesuviana line between the city and Sarno and its quadruplication is planned within a few years.
Having to import over 80% of its consumption, the quadruplication of oil price greatly contributed to its debt, inflation and competitiveness.
Quadruplication though the station was carried out in the 1960s, with the track being lowered 1.2 metres though the station, and a new citybound platform.
Although built with two island platforms, only the centre platform faces were initially in use until quadruplication between West Ryde and Epping was completed.
It was built just upstream and parallel to the Albert Bridge as part of the quadruplication of the Ipswich Line between 1955-1957.
Originally built as two side platforms, both were rebuilt as island platforms during the quadruplication of the Granville to Westmead line in the 1980s.
The quadruplication between Brisbane and Corinda was extended in 2009 to Darra enable services from the new Springfield branch line.
Turrella station was double track and electrified from its opening until 2000 when the Wolli Creek to Kingsgrove quadruplication was completed.
On 26 May 1929, Deutsche Reichsbahn completed the quadruplication of the line between Stuttgart Central Station and Feuerbach.
However, the General Manager of QR's South Eastern Division decided track amplification was more important, with quadruplication of the line from Corinda to Zillmere given priority.
In 1908, quadruplication began on the line between Stuttgart Central Station and Ludwigsburg, which led to the nearly complete rebuilding of the tracks and of the North station with it.
Several enhancement projects are underway as part of the Rail Clearways programme, the largest of which is a quadruplication of the East Hills line between Kingsgrove and Revesby.