India's Union Cabinet has approved the construction of third and fourth railway lines along a 198-kilometre stretch between Rajahmundry (Nidadavolu) and Visakhapatnam (Duvvada) in Andhra Pradesh, at an estimated cost of ₹9,889 crore (approximately $1.2 billion). The project forms part of a broader quadrupling initiative on the Howrah–Chennai High Density Network, one of the country's busiest rail corridors, and will cover a total track length of 458 kilometres. The expansion is intended to relieve severe congestion on a route that is critical to freight and passenger movement along India's eastern coastline.