Metro Tunnel
The Metro Tunnel (sometimes also known as the Melbourne Metro Rail Project or the Metro Rail Capacity Project) is a metropolitan rail infrastructure project currently under construction in Melbourne, Australia. It includes the construction of twin 9-kilometre rail tunnels between South Kensington station (north west of the Melbourne City Centre) and South Yarra (in the south east) with five new underground stations. The southern portal for the tunnel is to be located to the south of South Yarra station. As a result, the tunnel will connect the Pakenham and Cranbourne lines with the Sunbury line, and allow these lines to bypass Flinders Street station and the City Loop while still stopping in the Melbourne central business district.
East West Metro Tunnel
East West Metro Tunnel is an under construction underwater river tunnel of Kolkata Metro in Kolkata, West Bengal. The river tunnel is construct underneath Hooghly river. Tunnel length is and width is . A 520m stretch of the tracks will go through a tunnel under the Hooghly. The roof of the tunnel would be about 30 metres from the ground level. The tunnel will be completed in 2018. The tunnel will be "first underwater river tunnel in India " and South Asia . The tunnel used by East West Metro Line for metro rail service and constructed by Kolkata Metro Rail Corporation.