Editing Centralized traffic control (section)

==By country==

===Australia===
The first CTC installation in Australia was commissioned in September 1957 on the [[Glen Waverley railway line|Glen Waverley line]] in suburban [[Melbourne]]. {{convert|6|mi|km}} in length, it was installed by the [[Victorian Railways]] as a prototype for the [[North East railway line|North East standard project]].<ref name=vrto62>{{cite book | author = Leo J. Harrigan | title = Victorian Railways to '62 | year = 1962 | publisher = Public Relations and Betterment Board | page = 176 }}</ref>

In June 1959, the [[Western Australian Government Railways]] completed installation of Australia's first large-scale application of CTC, on the {{Track gauge|3ft6in|lk=on}} [[South Western Railway, Western Australia|South Western Railway]], which links {{rwsA|Perth}} with [[Old Bunbury railway station|Bunbury]]. Upon its completion, that CTC system covered the {{cvt|39|mi|km|adj=mid|-long}} portion of [[Single-track railway|single-track line]] between {{rwsA|Armadale|P}}, on Perth's south eastern outskirts, and {{rwsA|Pinjarra}}, further south.<ref name="rt 1959-08">{{cite journal |author=<!--not stated--> |title=Track Capacity Improved, Operating Costs Lowered With New CTC Plant |journal=Railway Transportation |date=August 1959 |pages=36-38,44 |url=https://www.facebook.com/photo/?fbid=10160239224773553&set=pcb.2880321552106351 |access-date=23 June 2024}}</ref>{{rp|36-38}}

CTC has since been widely deployed to major interstate railway lines.

===New Zealand===
CTC was first installed in New Zealand between [[Taumarunui railway station|Taumarunui]] and [[Okahukura railway station|Okahukura]] on the heavily trafficked [[North Island Main Trunk]] in 1938 followed by [[Te Kuiti railway station|Te Kuiti]]-[[Puketutu railway station|Puketutu]] in 1939.  and from [[Tawa Flat]] to [[Paekākāriki]] on the [[Kapiti Line]] in 1940, and extended from [[Paekākāriki]] to [[Paraparaumu]] in 1943; the continuation of tablet control on the short single-track section would have required manned tablet stations with a stationmaster and three (tablet) porters at each end of the section (see [[North–South Junction]]). This was followed on the NIMT by Puketutu-[[Kopaki railway station|Kopaki]] in 1945, between [[Frankton, Hamilton]] and [[Taumarunui]] from 1954 to 1957; and from [[Te Kauwhata]] to Amokura in 1954.

On other lines, CTC was installed between [[Upper Hutt]] and [[Featherston, New Zealand|Featherston]] in 1955 and between [[St Leonards, Otago|St Leonards]] and [[Oamaru]] in stages from 1955 to 1959. CTC was completed between [[Hamilton, New Zealand|Hamilton]] and Paekākāriki on the NIMT on 12 December 1966. 

On the [[Main South Line]] CTC was installed from [[Rolleston, New Zealand|Rolleston]] to [[Pukeuri]] north of [[Oamaru]] on the [[Main South Line]] in stages from 1969 to completion in February 1980. The older CTC installation from St Leonards to Oamaru was replaced in stages with [[Track Warrant Control]] in 1991 and 1992. 

The most recent installations of CTC were completed in August 2013 on the [[MNPL]] from Marton to Aramoho and from [[Dunedin]] to [[Mosgiel]] and on the [[Dunedin Railways|Taieri Gorge Line]] as far as North Taieri in late 2015.

===United States===
CTC-controlled track is significantly more expensive to build than non-signalled track, due to the electronics and failsafes required. CTC is generally implemented in high-traffic areas where the reduced operating cost from increased traffic density and time savings outweigh the capital cost. Most of [[BNSF Railway]]'s and [[Union Pacific Railroad]]'s track operates under CTC; the portions that are generally lighter-traffic lines that are operated under [[Track Warrant Control]] (BNSF and UP) or [[Direct Traffic Control]] (UP).{{citation needed|date=October 2020}}

Recently the costs of CTC has fallen as new technologies such as microwave, satellite and rail based data links have eliminated the need for wire pole lines or fiber optic links. These systems are starting to be called [[train management system]]s.{{citation needed|date=October 2020}}