A new metro loop corridor, spanning about 3 km, has been proposed in the heart of the national capital to cater to people who will be visiting the new government buildings coming up as part of the Central Vista redevelopment project, officials said on Monday. The new circular line will have four metro stations and it will be built separately from the existing metro corridors -- Yellow Line and Violet Line -- passing through the area, they said. The existing Central Secretariat station is an interchange facility between the Yellow Line and Violet Line. The foundation stone of the Central Vista project was laid in December 2020. The infrastructural revamp envisages a new triangular Parliament building and a common Central Secretariat. The Central Vista redevelopment project also seeks to upgrade the boulevard running from Vijay Chowk to India Gate with more amenities.