Patiala State Monorail Trainways (
PSMT) was a unique rail-guided, partially road-borne railways system running in
Patiala (
British India) from 1907 to 1927. PSMT was the second monorail system in India, after the
Kundala Valley Railway, and the only operational locomotive-hauled railway system built using the
Ewing System in the world. The Kundala Valley Railway pre-dated this, also using the Ewing system between 1902 and 1908, although this only used
bullocks for haulage. Following the conversion of the Kundala Valley Railway from a monorail to a narrow gauge railway in 1908, PSMT was the only monorail system in India until its closure in 1927. These were the only instances of a monorail train system in
India, until the
Mumbai Monorail was opened on 2 February 2014.