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The '''Dehri Rohtas Light Railway'''(DRLR) started off as '''Dehri Rohtas Tramway Company''' in 1907 promoted by the [[Octavius Steel & Co Ltd]] of [[Calcutta]]. The original contract was to build a 31 mile(40 km ) feeder line from [[Rohtas]] to the [[East Indian Railway]](EIR)'s Delhi-Calcutta mainline route at [[Dehri-on-Sone]].

The DRLR opened as a 2ft 6in/762mm narrow gauge([[Rail_gauge#Narrow_Gauge|NG]]) railway from [[Dehri-on-Sone]] to Rohtas, 24 miles(38km), and opened traffic in 1911 and was booming by 1913-14 when it carried over 50,000 passengers and 90,000 tons of freight, the goods traffic mainly consisting of marble and stone. <ref>[https://archive.org/stream/BombayBarodaAndCentralIndiaRailwaySystem/Bombay_Baroda_And_Central_India_Railway_System#page/n232n233/mode/2up 1up " Administration Report on the Railways in India – corrected up to 31st March 1918"; Superintendent of Government Printing, Calcutta; page 224]; Retrieved 2 Feb 2016</ref>and was booming by 1913-14 when it carried over 50,000 passengers and 90,000 tons of freight, the goods traffic mainly consisting of marble and stone.

In 1927, a 1½ mile(2.5 km ) spur was added to Rohtasgarh Fort from Rohtas<ref name=Hist1937>[https://ia801605.us.archive.org/30/items/in.ernet.dli.2015.36650/2015.36650.India-Railway-Board-History-Of-Indian-Railways-Constructed-And-In-Progress.pdf US Archive .org pdf download of ‘History Of Indian Railways, constructed and in progress’, 31 March 1937 by ‘The Government of India - Railway Department’ page 276 pdf 319]; Retrieved 30 Jul 2020</ref>.

The ‘Statistics of Working’ show the year-by-year financial results from 1913-14 through to 1936-37 <ref name=Hist1937/> == Classification ==[[Indian Railway Classification]] of 1926 - Class III railway system. ==Later Development==Rohtas Industries brought the line up to Tiura Pipradih by adding another 15 miles(25 km ) to the DRLR, most of which passed through their property.