The construction work for the Mumbai Metro project started in March 2009. The first trial run took place April 26, 2013. The Mumbai Metro can carry around 280-300 passengers per coach as opposed to the Monorail which has a capacity of 145-160 passengers per coach. It will initially run with 4 coaches but would later boast of 6 coaches. Sleek on the outside, roomy, comfortable and cool on the inside, the train ride was a quite, smooth affair-unlike anything the city has seen before. The Metro offers a smooth and noise-free ride. The quality of ride is comparable to a rail system.