The Frankston line is a suburban railway line in Melbourne, Australia, operated by Metro Trains Melbourne. It runs from the central business district to the suburb of Frankston, covering approximately 40 kilometers. The line serves several key suburbs, providing essential transport for commuters and residents. Opened in the late 19th century, the Frankston line has undergone various upgrades and extensions over the years. It features multiple stations, including Caulfield, Moorabbin, and Frankston, connecting passengers to other lines and services. The line is an important part of Melbourne's public transport network, facilitating travel across the region.