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Maharaja Sir Bhupinder Singh of the [[Princely states|Princely ]][[Patiala State]] got this unique railway system constructed to facilitate movement of people and goods in his state. The chief engineer of this project was Colonel [[C. W. Bowles ]] who had earlier successfully used monorail based on Ewing System (designed by William Thorold) during his stint as engineer during laying of tracks for [[Bengal-Nagpur Railway]] for transportation of construction materials and was made chief Engineer for the PSMT project. One of the objects of PSMT was to make use of the 560 mules being maintained by Patiala State. Apart from mules, bullocks were also used to haul the monorail before introduction of steam locomotives on the route of PSMT.<ref>[http://www.irfca.org/members/ddickens/PSMTArticle.pdf "The Railway Magazine, February 1969, pages 72-76, reproduced by IRFCA (Indian Railways Fan Club)]; Retrieved on 18 Apr 2016</ref>