Indian Infrastructure Magazine. The Union Cabinet approved an ₹2,390-crore extension of the Aqua Line from Noida Sector 51 to Greater Noida Sector 4. Greater Noida West Sector 4 Metro Rail Project on November 11, 2026. The project involves development of a 8.45 km elevated network connecting Noida Sector 51 and Greater Noida West Sector 4.