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The '''Agra-Delhi Chord Railway''' was a broad gauge([[Rail_gauge#Broad_Gauge|BG]]) line built to provide extra track capacity between [[Agra]] and [[Delhi]]. The line was worked by [[Great Indian Peninsula Railway]](GIPR).The line from Raja-ki-Mandi(Agra) to Delhi opened in 1904-5, a distance of 120 miles(193km). The line ran via Muttra(Mathura) and Kosi (Kosi Kalan)<refname=p76>[https://archive.org/stream/BombayBarodaAndCentralIndiaRailwaySystem/Bombay_Baroda_And_Central_India_Railway_System#page/n76/mode/2up 1up " Administration Report on the Railways in India – corrected up to 31st March 1918"; Superintendent of Government Printing, Calcutta; page 68 ]; Retrieved 29 Jan 201610 Nov 2018</ref>.[[File:Agra-Delhi Chord Railway.png|thumb| Agra-Delhi Chord Railway]] A ‘Branch Line’ of 6 miles(9.5km) from Kosi (Kosi Kalan) to Sanket was opened in 1906 <ref name=p76/>. ''This branch cannot be traced on modern maps''. In 1911 a ‘Loop Line connecting Agra-Delhi Chord Railway with Delhi-Umballa-Kalka and Southern Punjab Railways’, a distance of 0.22 mile(250 metres) was opened <refname=p76/>.