Mumbai, June 8 (ANI): After an inordinate delay of three years, daily commuters travelling by the overcrowded local train in Mumbai finally heaved a sigh of relief as the city metro is all set to roll in style from Sunday. Everyday hundreds and hundreds of harried passengers including professionals, college and school students, men women and children, cling to precarious doors and windows of suburban railway trains in a hurry to reach their destination. But now the passengers and residents of Mumbai can experience travel in a new way with the metro all set to start operations.