First CNG Train in India from Rewari-Rohtak section 

Railway Minister Suresh Prabhu on 13 January, 2015 inaugurated India’s first CNG (compressed natural gas) powered train on the Rewari – Rohtak link of Northern Zone. The move assumes significance as it will be the first time that a passenger train will be powered by an alternate fuel source apart from diesel. 
Railways have modified the 1,400 HP engine to run on dual fuel - diesel and CNG - through fumigation technology.

The Rewari passenger train will consume over 20 per cent of the CNG, covering 81 km long distance in about two hours. Railways had earlier conducted a trial run in the section.

The train comprising of two power cars and six car coaches has been manufactured by Integral Coach Factory at Chennai with the CNG conversion kit being supplied by Cummins.

Development of a CNG conversion technology which will permit utilisation of over 60 per cent CNG is also underway, he said, adding "switch over to LNG technology is also being planned as that will enable higher fuel carrying capacity."

Besides Rewari-Rohtak, Prabhu will also launch another passenger service between Rewari and Bikaner as announced in the Rail Budget 2014-15.