Editing Tamil Nadu (section)

===Rail===
[[File:Chennai_Central_Station_panorama.jpg|thumb|[[Chennai Central]] is a major rail station]]
[[File:Alstom Metropolis train-set at Guindy Metro station in Chennai.jpg|thumb|[[Chennai Metro]], the only operational metro rail in the state]]
{{See|Southern Railway zone}}

The rail network in Tamil Nadu forms a part of [[Southern Railway zone|Southern Railway]] of [[Indian Railways]], which is headquartered in Chennai with four divisions in the state namely [[Chennai railway division|Chennai]], [[Tiruchirappalli railway division|Tiruchirappalli]], [[Madurai railway division|Madurai]] and [[Salem railway division|Salem]].<ref>{{cite web|url=https://sr.indianrailways.gov.in/view_section.jsp?lang=0&id=0,1|title=Southern Railways, about us|publisher=Southern Railway|access-date=12 August 2023|archive-date=16 September 2023|archive-url=https://web.archive.org/web/20230916104302/https://sr.indianrailways.gov.in/view_section.jsp?lang=0&id=0,1|url-status=live}}</ref> As of 2023, the state had a total railway track length of {{convert|5601|km|0|abbr=on}} covering a route length of {{convert|3858|km|0|abbr=on}}.<ref name="SR1">{{cite report|url=https://sr.indianrailways.gov.in/cris//uploads/files/1686894847523-System%20Map%202023%20signed.pdf|title=System map, Southern Railway|publisher=[[Southern Railway (India)|Southern Railway]]|access-date=1 November 2023|archive-date=4 December 2023|archive-url=https://web.archive.org/web/20231204063842/https://sr.indianrailways.gov.in/cris/uploads/files/1686894847523-System%20Map%202023%20signed.pdf|url-status=live}}</ref> There are 532 railway stations in the state with [[Chennai Central]], [[Chennai Egmore railway station|Chennai Egmore]], [[Coimbatore Junction railway station|Coimbatore Junction]] and [[Madurai Junction railway station|Madurai Junction]] being the top revenue earning stations.<ref>{{cite web|url=https://www.tamilnadutourism.tn.gov.in/plan-your-trip/railways|title=Railways, plan your trip|publisher=Tamil Nadu tourism|access-date=1 November 2023|archive-date=7 November 2023|archive-url=https://web.archive.org/web/20231107192152/https://www.tamilnadutourism.tn.gov.in/plan-your-trip/railways|url-status=live}}</ref><ref>{{cite report|url=https://sr.indianrailways.gov.in/cris//uploads/files/1659695525713-SR.pdf|title=List of stations|publisher=[[Southern Railway (India)|Southern Railway]]|access-date=1 November 2023|archive-date=23 December 2023|archive-url=https://web.archive.org/web/20231223095122/https://sr.indianrailways.gov.in/cris//uploads/files/1659695525713-SR.pdf|url-status=live}}</ref> Indian railways also has a coach manufacturing unit at [[Integral Coach Factory|Chennai]], [[electric locomotive]] sheds at [[Electric Loco Shed, Arakkonam|Arakkonam]], [[Electric Loco Shed, Erode|Erode]] and [[Electric Loco Shed, Royapuram|Royapuram]], [[diesel locomotive]] sheds at [[Diesel Loco Shed, Erode|Erode]], [[Diesel Loco Shed, Golden Rock|Tiruchirappalli]] and [[Diesel Loco Shed, Tondiarpet|Tondiarpet]], [[Steam locomotive]] shed at [[Nilgiri Mountain Railway|Coonoor]] along with various maintenance depots.
<ref>{{cite news|title=DNA Exclusive: Is It Time for Indian Railways to Tear Up Ageing Tracks and Old Machinery?|url=https://zeenews.india.com/india/dna-exclusive-is-it-time-for-indian-railways-to-tear-up-ageing-tracks-and-old-machinery-2427973.html|publisher=[[Zee Media Corporation]]|date=14 January 2022|access-date=6 June 2023|archive-date=6 June 2023|archive-url=https://web.archive.org/web/20230606192252/https://zeenews.india.com/india/dna-exclusive-is-it-time-for-indian-railways-to-tear-up-ageing-tracks-and-old-machinery-2427973.html|url-status=live}}</ref><ref>{{cite web|url=https://irfca.org/faq/faq-shed.html|title=Sheds and Workshops|publisher=IRFCA|access-date=1 June 2023|archive-date=6 June 2023|archive-url=https://web.archive.org/web/20230606042648/https://irfca.org/faq/faq-shed.html|url-status=live}}</ref>

{|class="wikitable" style="text-align:center;" style="font-size: 85%"
|+Railway in Tamil Nadu<ref name="SR1"/>
!colspan="5"|Route length (km)
!colspan="3"|Track length (km)
|-
!colspan="3"|[[Broad-gauge railway|Broad Gauge]]
!rowspan="2"|[[Metre-gauge railway|Metre Gauge]]
!rowspan="2"|Total
!rowspan="2"|[[Broad-gauge railway|Broad Gauge]]
!rowspan="2"|[[Metre-gauge railway|Metre Gauge]]
!rowspan="2"|Total
|-
!Electrified
!Non electrified
!Total
|-
|style="text-align:center;"|3,476
|style="text-align:center;"|336
|style="text-align:center;"|3,812
|style="text-align:center;"|46
|style="text-align:center;"|3,858
|style="text-align:center;"|5,555
|style="text-align:center;"|46
|style="text-align:center;"|5,601
|}

Chennai has a well-established suburban railway network operated by Southern railway, covering {{cvt|212|km|mi|abbr=on|adj=on}} which was established in 1928.<ref name="CSR">{{cite report|title=Brief History of the Division|work=Chennai Division|publisher=Indian Railways—Southern Railways|url=http://www.sr.indianrailways.gov.in/uploads/files/1325745996774-about.pdf|access-date=26 October 2012|lang=en|archive-date=30 May 2012|archive-url=https://web.archive.org/web/20120530085500/http://www.sr.indianrailways.gov.in/uploads/files/1325745996774-about.pdf|url-status=live}}</ref><ref>{{cite report|url=https://sr.indianrailways.gov.in/cris//uploads/files/1623903361519-CHENNAI%20DIVISION%20-%20CATEGORY-2021.pdf|title=List of Stations, Chennai|lang=en|publisher=Southern Railway|access-date=23 August 2023|archive-date=20 November 2023|archive-url=https://web.archive.org/web/20231120200740/https://sr.indianrailways.gov.in/cris//uploads/files/1623903361519-CHENNAI%20DIVISION%20-%20CATEGORY-2021.pdf|url-status=live}}</ref> The [[Mass Rapid Transit System (Chennai)|Mass Rapid Transit System]] (MRTS) is an elevated urban mass transit system established in 1995 operating on a single line from [[Chennai Beach railway station|Chennai Beach]] to [[Velachery railway station|Velachery]].<ref name="CSR"/><ref name="MRTS">{{cite web|url=https://www.cmdachennai.gov.in/mrts_phase1.html|title=About MRTS|publisher=Chennai Metropolitan Development Authority|access-date=31 August 2023|language=en|archive-date=12 July 2023|archive-url=https://web.archive.org/web/20230712090557/https://www.cmdachennai.gov.in/mrts_phase1.html|url-status=live}}</ref> [[Chennai Metro]] is a [[rapid transit]] rail system in Chennai which was opened in 2015 and consists of two operational lines operating across {{cvt|54.1|km|mi|abbr=on|adj=on}} in 2023.<ref>{{cite web|url=https://wcag.chennaimetrorail.org/project-status/|title=Project status of Chennai Metro|date=19 November 2015|publisher=Chennai Metro Rail Limited|access-date=31 August 2023|language=en|archive-date=1 September 2023|archive-url=https://web.archive.org/web/20230901191324/https://wcag.chennaimetrorail.org/project-status/|url-status=live}}</ref> [[Nilgiri Mountain Railway]] is a {{Track gauge|1000mm|allk=on}} railway in [[Nilgiris district]] which was built by the [[United Kingdom|British]] in 1908 and is the only [[rack railway]] in India.<ref>{{cite web|title=Nilgiri mountain railway|url=https://sr.indianrailways.gov.in/view_section.jsp?fontColor=black&backgroundColor=LIGHTSTEELBLUE&lang=0&id=0,1,304,374,492,552|publisher=Indian Railways|access-date=21 August 2019|archive-date=6 December 2019|archive-url=https://web.archive.org/web/20191206122930/https://sr.indianrailways.gov.in/view_section.jsp?fontColor=black&backgroundColor=LIGHTSTEELBLUE&lang=0&id=0,1,304,374,492,552|url-status=live}}</ref><ref>{{cite web|url=https://whc.unesco.org/en/list/944/|title=Mountain Railways of India|publisher=UNESCO|access-date=1 March 2010|archive-date=19 December 2008|archive-url=https://web.archive.org/web/20081219024051/https://whc.unesco.org/en/list/944/|url-status=live}}</ref><ref>{{cite video|url=http://www.bbc.co.uk/programmes/b00qzzlm|title=Indian Hill Railways: The Nilgiri Mountain Railway|date=21 February 2010|access-date=1 March 2010|medium=TV|publisher=BBC|archive-date=24 February 2010|archive-url=https://web.archive.org/web/20100224133659/http://www.bbc.co.uk/programmes/b00qzzlm|url-status=live}}</ref>